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Post by floyd2133 on Nov 23, 2016 1:28:51 GMT -5
I currently have a 50 mm 100cc kit but I hear folks talking bout 62 mm bite kit and 150cc bore kit ? Should I upgrade my 100 cc why and why not ?
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Post by eclark5483 on Nov 23, 2016 2:26:14 GMT -5
No, don't upgrade. You are already putting alot of strain on that crank with a 100cc kit. If you want more CC's, buy a 150cc or better scoot.
ALSO... have you considered doing a gear swap? That will gain you about 10mph more.
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Post by floyd2133 on Nov 23, 2016 2:27:52 GMT -5
Gear swap?
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Post by gsx600racer on Nov 23, 2016 2:36:29 GMT -5
If you want something over 100cc you should consider a larger scooter. Building up a 50cc base scooter over 100cc is not a task for the novice or cost effective. Its possible with 52mm bores, stroker cranks, larger heads/valves plus the case machining required, cylinder spacers, its something you dont just slap together.
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Post by gsx600racer on Nov 23, 2016 2:41:43 GMT -5
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Post by eclark5483 on Nov 23, 2016 2:44:31 GMT -5
Yes GEAR SWAP. $33 free shipping www.ebay.com/itm/172039772546You'll have to get it pressed onto the old gear cog by a machine shop, but it will absolutely improve your top speed significantly. |
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Post by eclark5483 on Nov 23, 2016 2:46:05 GMT -5
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Post by greggkinney on Dec 2, 2016 2:33:56 GMT -5
Naraku 52.4mm 90cc is the biggest I've seen on the market. Most definitely use their crank if you go that big or the stroker crank mite be nice with that kit  |
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Post by humanshield on Dec 2, 2016 11:20:27 GMT -5
STG claims better acceleration in that ebay ad for those gears.
Normally, lowering the final drive ratio REDUCES acceleration.
Anyone using these gears who can report on the effect it had on your acceleration?
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Post by 90GTVert on Dec 2, 2016 11:41:33 GMT -5
I haven't done it on the 4Ts, but on my 2Ts with a lot of power I will say that you don't always notice much loss of acceleration with gear changes. It always feel snappier and more willing to wheelie with deeper (numerically higher) gear ratios though. Numerically lower gear ratios can improve acceleration at speed if your setup is normally revving past it's peak to be there. Otherwise, I wouldn't expect an improvement, unless maybe you happen to have a turbo on your 139QMB and it likes to pull.
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Post by humanshield on Dec 2, 2016 11:54:20 GMT -5
I haven't done it on the 4Ts, but on my 2Ts with a lot of power I will say that you don't always notice much loss of acceleration with gear changes. It always feel snappier and more willing to wheelie with deeper (numerically higher) gear ratios though. Numerically lower gear ratios can improve acceleration at speed if your setup is normally revving past it's peak to be there. Otherwise, I wouldn't expect an improvement, unless maybe you happen to have a turbo on your 139QMB and it likes to pull. I think I have a 83mm turbo in the pile I might slap on it It's a "1200HP turbo" so that should be fun  |
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Post by 90GTVert on Dec 2, 2016 13:35:52 GMT -5
I think I have a 83mm turbo in the pile I might slap on it It's a "1200HP turbo" so that should be fun Roughly 1mm per cc. Sounds like a winning recipe to me.  |
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Post by gsx600racer on Dec 2, 2016 13:51:50 GMT -5
For the love of.......... Don't give him any more ideas. LOL
I don't think I have it in me to explain how superchargers/turbo are not feasible on a small bore engines.
Next will be fuel injection conversions.
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Post by humanshield on Dec 2, 2016 14:30:48 GMT -5
For the love of.......... Don't give him any more ideas. LOL I don't think I have it in me to explain how superchargers/turbo are not feasible on a small bore engines. Next will be fuel injection conversions. love of...."Pete" ? haha Nah......looking at one of those 80lbs of thrust RC jet engines to mount on the back The sound, the thrust....THAT would be awesome I don't care WHO you are. |
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Post by gsx600racer on Dec 2, 2016 14:36:57 GMT -5
For the love of.......... Don't give him any more ideas. LOL I don't think I have it in me to explain how superchargers/turbo are not feasible on a small bore engines. Next will be fuel injection conversions. love of...."Pete" ? haha Nah......looking at one of those 80lbs of thrust RC jet engines to mount on the back The sound, the thrust....THAT would be awesome I don't care WHO you are. His neighbors are gonna love him running that in the living room. At least it will drown out the smoke detector chirping. |
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