TMX 30 Malossi 210 sport setups
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Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Sat May 11, 2019 7:51 am quote
Hi all!

Anyone fitted a TMX 30 (with powerjet) to a rotary malossi 210 setup?

Anyone have any ideas of the jetting?

Current setup:

PJ 25 1.25 screws out
MJ 220
Powerjet 30
Needle 5DP39 (default was 5el68) clip in the middle

Seems to be running a little rich, Iím at sea level
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Sun May 12, 2019 8:53 pm quote
Bump, anyone have any insights?

Thanks guys
Ossessionato
2015 GTS300, 1974 Primavera, 04 Ninja 250
Joined: 04 Apr 2013
Posts: 4526
Location: San Diego, CA
Mon May 13, 2019 6:50 am quote
I can't help much but by far the most common setups are Dellorto, followed by PWK. I've not seen barely anyone running Mikuni. This is probably why you are getting crickets....
Enthusiast
PX 200
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Mon May 13, 2019 8:25 am quote
sdjohn wrote:
I can't help much but by far the most common setups are Dellorto, followed by PWK. I've not seen barely anyone running Mikuni. This is probably why you are getting crickets....
Thanks for the reply!

I see the Mikuni seems popular in Germany... Iíve ran all 3, I started with the dellorto, which was a challenge to jet... ended up in a decent place but never had the pulling power of the PWK... but that always ended up running rich... so now ended up with the TMX... it seems to have the best torque. itís great at WOT... but not quite there yet at idle and low revs...
Ossessionato
2015 GTS300, 1974 Primavera, 04 Ninja 250
Joined: 04 Apr 2013
Posts: 4526
Location: San Diego, CA
Mon May 13, 2019 9:05 am quote
I've spent over a year jacking around trying to get my PWK to jet in. But that's a different 40 page thread .
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2513
Location: London UK
Tue May 14, 2019 12:08 am quote
Power jet carbs are usually best suited to very high rpm (10,000+). What is the spec of your engine?
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Wed May 15, 2019 7:07 am quote
Jack221 wrote:
Power jet carbs are usually best suited to very high rpm (10,000+). What is the spec of your engine?
- Malossi 210 sport cylinder and piston, 1.72mm base gasket
- Scooter and service malossi 210 low compression cylinder head
- MAZZUCCHELLI 60mm rotary crank
-extended intake port to 120degrees
- Sip clutch basket with Honda CR80 clutch plates, straight teeth
- Nordspeed Camaro

Not sure if Iíve missed anything
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Wed May 15, 2019 7:08 am quote
Oh and gearing has changed, canít remember what Iíve ended up on though...
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Wed May 15, 2019 7:36 am quote
sdjohn wrote:
I've spent over a year jacking around trying to get my PWK to jet in. But that's a different 40 page thread .
Anyone used the PwK air striker?
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Wed May 15, 2019 7:46 am quote
108 wrote:
Oh and gearing has changed, canít remember what Iíve ended up on though...
Found it old invoice... 24/63 teeth
Molto Verboso
One or two fun scoots....nothing too precious
Joined: 17 Jul 2013
Posts: 1566
Location: UK (South East)
Wed May 15, 2019 9:08 am quote
The 1.7mm base packer is going to put your timing up high, which implies you are after a high revving motor and peak power. Your gearing says otherwise. The 24/63 is very tall. It's what I use on my Pinasco 225 tourer, which is all about low down grunt.
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Wed May 15, 2019 9:18 am quote
swa45 wrote:
The 1.7mm base packer is going to put your timing up high, which implies you are after a high revving motor and peak power. Your gearing says otherwise. The 24/63 is very tall. It's what I use on my Pinasco 225 tourer, which is all about low down grunt.
Any ideas for a better gear setup? 23/62?
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2513
Location: London UK
Wed May 15, 2019 9:21 am quote
23/65 is pretty good for a 221

Set up seems like you were expecting 100mph. 1.7mm packer is probably good for 10,000 rpm and on 24/63 that is 100mph at 9000 rpm. Unfortunately a 30mm carb (of any make) on a rotary is not going to get you to 100mph.

If you put your PWK back on you could copy sdjohn for set up. Would save you a few years
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2513
Location: London UK
Wed May 15, 2019 9:31 am quote
For the way forward, as you have a sport and is meant for touring type riding, the base packer should come right down to about 0.50mm. Fix the squish at 1.2 or less. If you want to keep that gearing you'll most likely need a 57mm crank back in.
Enthusiast
PX 200
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Posts: 85

Wed May 15, 2019 9:41 am quote
Jack221 wrote:
For the way forward, as you have a sport and is meant for touring type riding, the base packer should come right down to about 0.50mm. Fix the squish at 1.2 or less. If you want to keep that gearing you'll most likely need a 57mm crank back in.
Thanks for the insights..!

Donít mind changing the gearing... Iíve read of someone with a similar setup using 20/68...

Iím not after top speed if it takes forever to get there...

Ideally Iím after a setup which can handle city riding... on steroids...
Enthusiast
PX 200
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Wed May 15, 2019 9:49 am quote
Canít be right at 20/68... apparently running on 100/90-10 tires
Enthusiast
PX 200
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Thu May 16, 2019 4:44 am quote
Bump
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2513
Location: London UK
Fri May 17, 2019 12:25 am quote
What gearing you have available? If you think you spend all your time in 3rd then it will need to be reduced.

23/65 with a 36 4th works for most, like it always did. If you are keeping the 60mm crank then the Sport kit will pull better than the MHR but but still not go near the 24/62. Easy to trim the gearing with a clutch cog or bigger tyre later on.

With the set up it seems like you wanted the MHR would have been a better choice but working with what you have the 0.5mm base I said before will be a little low. Maybe start at 1.0mm base and see how it goes. Will need to do something with the head to get the squish under 1.2mm.
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
Joined: 30 Nov 2011
Posts: 8024
Location: Victoria, Australia
Fri May 17, 2019 1:22 am quote
Vader ran a TMX for a while on his old Malossi 221 and told me he was never happy with it. He changed to an Airstriker and found it much better... if you search for his posts you might get some jetting tips.
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Fri May 17, 2019 2:28 am quote
Jack221 wrote:
What gearing you have available? If you think you spend all your time in 3rd then it will need to be reduced.

23/65 with a 36 4th works for most, like it always did. If you are keeping the 60mm crank then the Sport kit will pull better than the MHR but but still not go near the 24/62. Easy to trim the gearing with a clutch cog or bigger tyre later on.

With the set up it seems like you wanted the MHR would have been a better choice but working with what you have the 0.5mm base I said before will be a little low. Maybe start at 1.0mm base and see how it goes. Will need to do something with the head to get the squish under 1.2mm.
I was going to go onto SIP to see what gearing was available...

Sounds like 23/65 seems most sensible... I do want to keep the 60mm crank, I donít have a shorter crank on hand...

Will look at my gaskets... I do like to have a more revvy setup, but maybe I need to balance it out
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Fri May 17, 2019 2:35 am quote
Ginch wrote:
Vader ran a TMX for a while on his old Malossi 221 and told me he was never happy with it. He changed to an Airstriker and found it much better... if you search for his posts you might get some jetting tips.
Oh man... that doesnít give me too much confidence... I kinda like the TMX just because of the torque... but it does seem like theyíre all Dyno setups... not very practical on the street
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Fri May 17, 2019 3:17 am quote
Ginch wrote:
Vader ran a TMX for a while on his old Malossi 221 and told me he was never happy with it. He changed to an Airstriker and found it much better... if you search for his posts you might get some jetting tips.
Oh, and do you know if it was on a rotary setup? Would be great to know if I can apply the learnings from Vader
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
Joined: 30 Nov 2011
Posts: 8024
Location: Victoria, Australia
Fri May 17, 2019 3:51 am quote
No, reed. Now that I think about it the other reason to change was due to space restrictions... it was in his Super I believe.

Have you looked for similar setups here?
http://lfs.alexander-hepp.de/
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Fri May 17, 2019 4:42 am quote
Ginch wrote:
No, reed. Now that I think about it the other reason to change was due to space restrictions... it was in his Super I believe.

Have you looked for similar setups here?
http://lfs.alexander-hepp.de/
Thatís my go to website... so Iíve tried all the settings for 221 rotary setups... all not quite right... good for general direction...

Iíve setup my tmx similar to one setup in the list... but the gearing is insane... 20/68... means itís a revving monster!
Molto Verboso
2007 Stella 150
Joined: 02 Nov 2019
Posts: 1291
Location: Rochester, Minnesota
Wed Oct 14, 2020 2:57 pm quote
Did you ever get this dialed in? What did you end up with for jetting?
Enthusiast
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Wed Oct 14, 2020 6:22 pm quote
Christopher_55934 wrote:
Did you ever get this dialed in? What did you end up with for jetting?
I had a ďnot bad setupĒ but it was on the lean side, especially 0-1/2 throttle.

I have all the needles from 53-58 and I just couldnít get it with enough power without being too hot.

I gave up in the end and put a pwk carb with fuel pump on it... the main reason I wanted to add the fuel pump without drilling into the crankcases

Let me see if I wrote it down my last TMX settings...
Molto Verboso
2007 Stella 150
Joined: 02 Nov 2019
Posts: 1291
Location: Rochester, Minnesota
Thu Oct 15, 2020 2:47 am quote
108 wrote:
Christopher_55934 wrote:
Did you ever get this dialed in? What did you end up with for jetting?
I had a ďnot bad setupĒ but it was on the lean side, especially 0-1/2 throttle.

I have all the needles from 53-58 and I just couldnít get it with enough power without being too hot.

I gave up in the end and put a pwk carb with fuel pump on it... the main reason I wanted to add the fuel pump without drilling into the crankcases

Let me see if I wrote it down my last TMX settings...
Thank you for looking, working on setting one up myself. Ordered a handful of needles and jets myself. If you have any spare parts let me know. Mines on the cool side.
Molto Verboso
2007 Stella 150
Joined: 02 Nov 2019
Posts: 1291
Location: Rochester, Minnesota
Thu Oct 15, 2020 4:34 am quote
Re: TMX 30 Malossi 210 sport setups
108 wrote:
Hi all!

Anyone fitted a TMX 30 (with powerjet) to a rotary malossi 210 setup?

Anyone have any ideas of the jetting?

Current setup:

PJ 25 1.25 screws out
MJ 220
Powerjet 30
Needle 5DP39 (default was 5el68) clip in the middle

Seems to be running a little rich, Iím at sea level
Do you remember how you ended up with that needle? Its the stock needle for a TM28.
Enthusiast
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Fri Oct 16, 2020 4:16 pm quote
It seems like the most common TMX carb is the 35mm version, I thought I'd try a 30mm TMX on my 260 but it just seemed like there was not a lot of needles and slides available and I could never get it jetted correctly because of that. I ended up going back to a 30mm PHBH, as there's so much more info and variables available.
Molto Verboso
2007 Stella 150
Joined: 02 Nov 2019
Posts: 1291
Location: Rochester, Minnesota
Fri Oct 16, 2020 5:14 pm quote
Stuarttiainen wrote:
It seems like the most common TMX carb is the 35mm version, I thought I'd try a 30mm TMX on my 260 but it just seemed like there was not a lot of needles and slides available and I could never get it jetted correctly because of that. I ended up going back to a 30mm PHBH, as there's so much more info and variables available.
I have been able to get everything except needle jets the 622 series isn't popular. I may see if I can find another one that fits, I think mine is actually pretty close. I thought it was running cool, but have found several people with a Pinasco 225 and it seems 200 -225F is normal. I have a hand full of 5 series needles. They are the same needles used in a few different carburetors including a TM28 or VM28 seems the naming nomenclature is a bit screwed up on the one. I have a TM28 in a box that a lot of the parts interchange. May pull it out and try, just to see if there is a difference between the two. Seems a lot of people are still using a SI 24 on the same motor.
Enthusiast
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Joined: 16 Jun 2015
Posts: 90
Location: Brisbane, QLD
Fri Oct 16, 2020 8:29 pm quote
Christopher_55934 wrote:
Stuarttiainen wrote:
It seems like the most common TMX carb is the 35mm version, I thought I'd try a 30mm TMX on my 260 but it just seemed like there was not a lot of needles and slides available and I could never get it jetted correctly because of that. I ended up going back to a 30mm PHBH, as there's so much more info and variables available.
I have been able to get everything except needle jets the 622 series isn't popular. I may see if I can find another one that fits, I think mine is actually pretty close. I thought it was running cool, but have found several people with a Pinasco 225 and it seems 200 -225F is normal. I have a hand full of 5 series needles. They are the same needles used in a few different carburetors including a TM28 or VM28 seems the naming nomenclature is a bit screwed up on the one. I have a TM28 in a box that a lot of the parts interchange. May pull it out and try, just to see if there is a difference between the two. Seems a lot of people are still using a SI 24 on the same motor.
I loved the SI24/sport combo, I used to just run a box pipe, SIP road I think, it was a great reliable combo. Once the tuning bug bites though...
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Fri Oct 16, 2020 10:33 pm quote
Christopher_55934 wrote:
108 wrote:
Hi all!

Anyone fitted a TMX 30 (with powerjet) to a rotary malossi 210 setup?

Anyone have any ideas of the jetting?

Current setup:

PJ 25 1.25 screws out
MJ 220
Powerjet 30
Needle 5DP39 (default was 5el68) clip in the middle

Seems to be running a little rich, Iím at sea level
Do you remember how you ended up with that needle? Its the stock needle for a TM28.
Yeah I ended up with 6EN11-57, middle clip...

Oh I ended up swapping out the TMX30 with power jet for one without...
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Fri Oct 16, 2020 10:38 pm quote
Stuarttiainen wrote:
It seems like the most common TMX carb is the 35mm version, I thought I'd try a 30mm TMX on my 260 but it just seemed like there was not a lot of needles and slides available and I could never get it jetted correctly because of that. I ended up going back to a 30mm PHBH, as there's so much more info and variables available.
Yeah I asked around companies that sell the TMX... no one plays around with the slide... old dual carb MX would use it apparently... itís a little surprising, because I think there is where the problem lies... but Iím thinking about the way itís designed and itís target market, maybe itís not suppose to be used on low revving 2 strokes... because it runs great at higher rpms...

The PHBH is a great carb... the jets make a lot of sense, but the round slide just feels too old and soft...
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Fri Oct 16, 2020 10:47 pm quote
Stuarttiainen wrote:
Christopher_55934 wrote:
Stuarttiainen wrote:
It seems like the most common TMX carb is the 35mm version, I thought I'd try a 30mm TMX on my 260 but it just seemed like there was not a lot of needles and slides available and I could never get it jetted correctly because of that. I ended up going back to a 30mm PHBH, as there's so much more info and variables available.
I have been able to get everything except needle jets the 622 series isn't popular. I may see if I can find another one that fits, I think mine is actually pretty close. I thought it was running cool, but have found several people with a Pinasco 225 and it seems 200 -225F is normal. I have a hand full of 5 series needles. They are the same needles used in a few different carburetors including a TM28 or VM28 seems the naming nomenclature is a bit screwed up on the one. I have a TM28 in a box that a lot of the parts interchange. May pull it out and try, just to see if there is a difference between the two. Seems a lot of people are still using a SI 24 on the same motor.
I loved the SI24/sport combo, I used to just run a box pipe, SIP road I think, it was a great reliable combo. Once the tuning bug bites though...
I honestly would steer away from using an Si carb with a tuned engine... itís nice and easy, but people who have used it on engine tunes that arenít pushing the scooter hard, itíll definitely run ok... riding it like a stock scooter... again, just the way itís designed, itís impossible for the carb to provide enough fuel even with the bigger jets...
Enthusiast
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Joined: 16 Jun 2015
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Location: Brisbane, QLD
Fri Oct 16, 2020 10:55 pm quote
I've had good success with SI24 carbs on tuned engines, mainly malossi 210 or 221 sport setups. I've researched and have done various mods as many people suggest, like opening up the float bowl chamber outlet to main jet stack, 5.2mm needle, modified float top, etc. Never seized one, always ran smooth, ability to go WOT with a nice colour plug. It's still a rotary valve engine and in no way liken it to a reed motor but for what it is, it's a great carb. As I said though, I've now got a 232 and a 260 quattrini both running reed intakes and 30mm dellortos.
Enthusiast
PX 200
Joined: 25 May 2016
Posts: 85

Fri Oct 16, 2020 11:50 pm quote
Stuarttiainen wrote:
I've had good success with SI24 carbs on tuned engines, mainly malossi 210 or 221 sport setups. I've researched and have done various mods as many people suggest, like opening up the float bowl chamber outlet to main jet stack, 5.2mm needle, modified float top, etc. Never seized one, always ran smooth, ability to go WOT with a nice colour plug. It's still a rotary valve engine and in no way liken it to a reed motor but for what it is, it's a great carb. As I said though, I've now got a 232 and a 260 quattrini both running reed intakes and 30mm dellortos.
Itís a good carb, it was designed for large frames... and for sure itíll run smooth with a balanced lower power setup and seizes would only come if jetted incorrectly.

Fuel starvation is my biggest concern, but only if the engine is pushed through its paces... a pretty solid setup can be achieved no doubt...
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