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Allstate cruisaire
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I recently purchased a 1963 Allstate project. It has a 150cc Stella motor swap with a 10" tire in the rear. Still had the stock front end with an 8" tire. Here's my dilemma: Do I convert the front end to a 10" tire (the seller gave me a front fork from a Sprint, but needs complete rebuild) or do I convert the rear back to an 8" tire?

Reading online it sounds like converting to 10" up front is going to be a real hassle, but if I convert the rear back to an 8" I will lose speed (which I kind of need). If I convert the rear back to an 8" what would I need to do to regear so I don't lose so much speed?
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Danimalsaurus wrote:
I recently purchased a 1963 Allstate project. It has a 150cc Stella motor swap with a 10" tire in the rear. Still had the stock front end with an 8" tire. Here's my dilemma: Do I convert the front end to a 10" tire (the seller gave me a front fork from a Sprint, but needs complete rebuild) or do I convert the rear back to an 8" tire?

Reading online it sounds like converting to 10" up front is going to be a real hassle, but if I convert the rear back to an 8" I will lose speed (which I kind of need). If I convert the rear back to an 8" what would I need to do to regear so I don't lose so much speed?
the only safe way to convert the front end is by using a GS150 or GL150 fork.

You can run a LML engine converted to 8", but you will be really ringing it out at 55 mph. . . .although it would be fun in every gear. I think you can use a clutch cog with more tooth that would help. To get it back to "standard gearing," you have to split the case and install something like 24/63 or 23/64 gearing.

Hope that helps.
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1958 Allstate 177VMC, 1962 Allstate, Yamaha Vino 70cc
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As someone who did the 10" swap on my first go, stick with the 8" wheels. I swapped back after a few months. They just look right and ride right with the 8's
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GickSpeed wrote:
the only safe way to convert the front end is by using a GS150 or GL150 fork.

You can run a LML engine converted to 8", but you will be really ringing it out at 55 mph. . . .although it would be fun in every gear. I think you can use a clutch cog with more tooth that would help. To get it back to "standard gearing," you have to split the case and install something like 24/63 or 23/64 gearing.

Hope that helps.
My only reason to keep it as fast as possible, but safely, is because my commute to work has roads of 50+ mph and I want to make sure I'm not blocking or putting myself in a position to getting run over by going too slow. The motors in it now has a few mods and I'm told with me riding I should be able to hit at least 60 mph. Not that I plan on going that fast, but it's there if I need to. If I go back to an 8" on the lml motor, I gotta make sure I can recover some of the speed loss. If I just do the clutch cog, what would be my realistic speed on an 8" tire?
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FridayMatinee wrote:
As someone who did the 10" swap on my first go, stick with the 8" wheels. I swapped back after a few months. They just look right and ride right with the 8's
I just don't want to sacrifice a bunch of speed by converting back to an 8". I need to be able to keep up with traffic in my area of at least 55 mph
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Molto Verboso
1964 Allstate Cruisaire, 2022 Husqvarna Vitpilen 401, 1972 Suzuki T500J
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Danimalsaurus wrote:
If I just do the clutch cog, what would be my realistic speed on an 8" tire?
Here is a calc:

https://www.scooterhelp.com/tuning/vespa.gear.calc.html
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 66 Lammy S3
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Lucky
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You need to know what your max usable RPM's are since, as you said, it has "some mods." The OG motor in that bike was probably good for 50 MPH, max. If you're trying to hit serious speeds (i.e. 60+), you're going to want to spend some cash for quality shocks, mounts, wheels and tires.

I have a 10" motor (SprintV) with "some mods" in my VBB that I converted to 8" with the SIP rear hub. It does 65, but it also revs waaaay out to get there.
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Danimalsaurus wrote:
My only reason to keep it as fast as possible, but safely, is because my commute to work has roads of 50+ mph and I want to make sure I'm not blocking or putting myself in a position to getting run over by going too slow. The motors in it now has a few mods and I'm told with me riding I should be able to hit at least 60 mph. Not that I plan on going that fast, but it's there if I need to. If I go back to an 8" on the lml motor, I gotta make sure I can recover some of the speed loss. If I just do the clutch cog, what would be my realistic speed on an 8" tire?
split the case-

*Change out the crank to something decent. the LML cranks are prone to failure. Recommendation, but you do you.
*change gearing to 24/63
*Change out 10" brake shoes, dust cover to 8" version. Add 8" drum & rear drum plate

Now you have successfully completed an 8" conversion that will allow you to cruise comfortably at 55 mph and probably be good up 70 mph.

another option would be source a running VNB engine and add a Pinasco 177 cylinder kit with a 20.20 carb.
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bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
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Quote:
If I just do the clutch cog, what would be my realistic speed on an 8" tire?
I could be wrong but I don't think there's a clutch cog available that will get you anywhere close to 60mph on 8's by itself with your gearing.

DRT makes a realllllllllly long primary that might be fun to try though.

https://www.sip-scootershop.com/en/product/gearbox-25-62-2-48-teeth-drt_16020200
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Hooked
1974 v90, 1959 Allstate, 1979 p200
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I'm working on a very similar project 59 Allstate with Stella engine. Voodoo helped me convert the rear wheel to 8in.

The gearing is fun (fast) as is and makes a great "around town" scooter. But if you want to ride highways look into gearing changes. I'd start with the rear wheel swap and keep everything else stock, then think about gearing later. Save the 10in parts if you want to change direction in the future.

I'm curious if anyone here has fit a 4.0x8 tire on a 10" stella/P engine?
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mor_ wrote:
I'm working on a very similar project 59 Allstate with Stella engine. Voodoo helped me convert the rear wheel to 8in.

The gearing is fun (fast) as is and makes a great "around town" scooter. But if you want to ride highways look into gearing changes. I'd start with the rear wheel swap and keep everything else stock, then think about gearing later. Save the 10in parts if you want to change direction in the future.

I'm curious if anyone here has fit a 4.0x8 tire on a 10" stella/P engine?
Did you use a conversion kit for rear and if so can you tell me which one? I'm not really looking for highway speeds, but 55-60 would be ideal.
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GickSpeed wrote:
split the case-

*Change out the crank to something decent. the LML cranks are prone to failure. Recommendation, but you do you.
*change gearing to 24/63
*Change out 10" brake shoes, dust cover to 8" version. Add 8" drum & rear drum plate

Now you have successfully completed an 8" conversion that will allow you to cruise comfortably at 55 mph and probably be good up 70 mph.

another option would be source a running VNB engine and add a Pinasco 177 cylinder kit with a 20.20 carb.
Thank you. I'm looking to find a conversion kit and see what's available. I got to thinking about it and I think the 10" tire in the back was to help give clearance to the exhaust.
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 66 Lammy S3
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Danimalsaurus wrote:
Did you use a conversion kit for rear and if so can you tell me which one? I'm not really looking for highway speeds, but 55-60 would be ideal.
For the rear wheel conversion, SIP make an 8" kit. Build quality of mine was so-so (welds broke on a couple of the studs after short use), but the hub is centered and the studs were straight, which is what really matters.
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chandlerman wrote:
For the rear wheel conversion, SIP make an 8" kit. Build quality of mine was so-so (welds broke on a couple of the studs after short use), but the hub is centered and the studs were straight, which is what really matters.
for a little bit more, this is a better product-

New 10" to 8" SIP conversion
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Hooked
1974 v90, 1959 Allstate, 1979 p200
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Didn't use a kit, just spare parts. You need to get everything in the links posted above -but might be able to source used parts a bit cheaper.

If you go with used parts, the biggest thing to watch out for is making sure you get the brake components for for 3-pin style and not the older 2 pin style.
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