Best Crank for Malossi 210 Reed Valve
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Vespa P200E
Joined: 18 Feb 2020
Posts: 5
Location: Houston
Thu Mar 19, 2020 9:20 am quote
OK, Malossi experts, this is for you! I just stripped down my P2 Malossi 210 engine built by Taffspeed in 1992 (yes, not opened since then and maybe 25K miles on it). Crank needs replacing and seems to be a lot of varied opinions on optimal type. The motor is 2016 210 Sport, 30MM PHBH, Polini Box exhaust and T5 4th gear. Looking for a fast touring bike and with the box exhaust will probably put a 24T clutch on. Anyway, thoughts on cranks? Bell seem to be in 60mm only (?) and flowed seemed to be for rotary. So, just a regular old Mazz crank or something more exotic....cheers!
Ossessionato
2015 GTS300, 1974 Primavera, 04 Ninja 250
Joined: 04 Apr 2013
Posts: 4431
Location: San Diego, CA
Thu Mar 19, 2020 9:38 am quote
i ran the Tameni but the duration was too short and I had to do surgery on it.

many like the Pinasco one, seems to be a popular choice with reasonable duration.
Member
Vespa P200E
Joined: 18 Feb 2020
Posts: 5
Location: Houston
Thu Mar 19, 2020 9:54 am quote
Cheers for the response but what type of crank are you referring to? this is where i struggle to understand what is the optimal crank for a reed valve malossi motor....
Molto Verboso
One or two fun scoots....nothing too precious
Joined: 17 Jul 2013
Posts: 1476
Location: UK (South East)
Thu Mar 19, 2020 10:25 am quote
Do you not fancy a 60mm? I would have thought Mazz bell crank.
Member
Vespa P200E
Joined: 18 Feb 2020
Posts: 5
Location: Houston
Thu Mar 19, 2020 10:43 am quote
Had not planned to move to a long stroke but may be an option? The bell cranks don't seem to come in 57mm flavor...
Ossessionato
Joined: 26 Oct 2015
Posts: 2543

Thu Mar 19, 2020 11:44 am quote
I'd probably pass on anything Mazzy and go a little bit more exotic...just from a quality standpoint. They're not too bad, but there are ones that are better.
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: 7707
Location: Victoria, Australia
Thu Mar 19, 2020 1:12 pm quote
I think S & S do a 57 bell... will check.

Otherwise the combo that you mention with a bell is an absolute blast. Mine (with 60 Mazz bell) pulls away in 4th from ridiculously low speeds. Just so much torque it's great. I have the thin gasket at the base and about a 1.1mm spacer at the top from memory.
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: 7707
Location: Victoria, Australia
Thu Mar 19, 2020 1:18 pm quote
They don't unfortunately. What have you got against the long stroke?
Member
Vespa P200E
Joined: 18 Feb 2020
Posts: 5
Location: Houston
Fri Mar 20, 2020 6:37 am quote
Thanks for the input guys...Ginch, nothing against long stroke option, just had read some concerns about long term issues but all hearsay so maybe that's the way to go. Assume packing plate / gasket calculations are available somewhere to get right combo? New territory for me....
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: 7707
Location: Victoria, Australia
Fri Mar 20, 2020 4:47 pm quote
I've put quite a number of kilometres on mine, can't tell you how much but as many weekend rides and 1000+ km trips as I can get in.
The only crank I've killed was a 5+ year old flowed one I bought from SIP, had it in my BGM 177 and was seeing how fast I could go in 2nd gear, for a couple of k's... Did the big end. Now I've replaced it with a 200 bell crank with packers to suit.
Think you can expect 'normal' long life from it but of course it'll go so well that you'll want to give it heaps! So there is that to consider!

The initial advice I got was to fit it with no base gasket and whatever head packers to make it up to the recommended squish. I was feeling anxious about grinding my shiny new cylinder so didn't touch port timings, just case matched. The only significant change I made (and definitely not a necessity) was to lower the compression a bit... I used an LTH head with a larger combustion chamber but machined to give about a 1mm squish. Oh and I do have a base gasket now, just a thin one to lift the ports to BDC, previously they were masked a teensy bit.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2229
Location: London UK
Fri Mar 20, 2020 10:06 pm quote
+1 bell crank is the most powerful. Even more so, with a big carb and real expansion pipe.
Member
Vespa P200E
Joined: 18 Feb 2020
Posts: 5
Location: Houston
Sat Mar 21, 2020 10:53 am quote
Appreciate the insight, cheers! Pretty much sold on Bell long stroke; seems a good fit for my set-up. Interesting FMP YouTube videos on crank quality...guess you get what you pay for! now about clutches....
Land of 10,000 Scoots Rally   Vespa Wasp Pin Badges   AF1 Racing Vespa Austin
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