Cheaper Jackshafts?

willfargo

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Aug 19, 2011
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I've been searching for a jackshaft, and the only pre-made ones i have been able to find are the ones from sickbikeparts.com.
However! $200+ sounds extreme for such a simple small part!
I have found many threads of people building their own, however none seem specific enough to really get my head around what is needed. Can anyone point me towards a thread or link of a specific and simple build? or does anyone know of an alternative jackshaft that is less than 200?

Thanks!
 
You must be thinking of the shift kit they offer. That is a lot more than a jackshaft.
I bought parts from McMaster Carr (credit card) for a jackshaft set-up. You select what you want from their vast array, punch in bearings, and shaft. You can get pillow block bearings (cheapest ones are about 10$ each) pulleys, sprockets and keyed shafts and chain.
 
I've been searching for a jackshaft, and the only pre-made ones i have been able to find are the ones from sickbikeparts.com.
However! $200+ sounds extreme for such a simple small part

Thanks!
You get all these parts for $200 from Sick Bike Parts.
You can order separate parts from the kit.

What motor are you using the jack shaft with?

HDSKNew.jpg
 
Im still trying to determine what engine to get. i was looking at a 66cc, however my towns ordinance requires it to be lower than 50cc, and i was told that somehow 49ccs can be tuned to run much better than a 66cc. any recommendations?
 
ok. So say i have a 50 mile commute to a college town i take ever weekend. What setup would be best for getting me a long distance. Something that can average 35-40mph. Fuel boosters? what are the best carbs? what engine? i'll probably save up and go with the SBP shift kit
 
To me the best set-up would not be a china 2 stroke from what I read on these motor bike forums. 25 miles would be a long way to pedal with a dead motor.
 
66/80cc

The Professor is right. You can't tell by just looking what cc it is. The only way to tell is to take off the head and measure it. So go with the 66/80cc, And when asked, Your response is always, Why, yes officer, It is a 49cc. I've been doing this for almost five years now with no problems. I don't think a cop is gonna take you're engine apart to find out what cc it is. But hey, I'm just a rebel at heart, so do only what you feel comfortable doing.
The easiest, and cheapest way to hit 40mph is with the 66/80cc chinese engine. If you go with the 49cc I'm afraid you'll have to go with the sbp shift kit, or something like it, to hit 40mph.
Thanks,
Big Red.
 
ok. So say i have a 50 mile commute to a college town i take ever weekend. What setup would be best for getting me a long distance. Something that can average 35-40mph. Fuel boosters? what are the best carbs? what engine? i'll probably save up and go with the SBP shift kit

the HT kits and sub $200 is not the best choice for this kind of use
the grube kits or similar are LOT more reliable
and will last lot longer
 
The Professor is right. You can't tell by just looking what cc it is. The only way to tell is to take off the head and measure it. So go with the 66/80cc, And when asked, Your response is always, Why, yes officer, It is a 49cc. I've been doing this for almost five years now with no problems. I don't think a cop is gonna take you're engine apart to find out what cc it is. But hey, I'm just a rebel at heart, so do only what you feel comfortable doing.
The easiest, and cheapest way to hit 40mph is with the 66/80cc chinese engine. If you go with the 49cc I'm afraid you'll have to go with the sbp shift kit, or something like it, to hit 40mph.
Thanks,
Big Red.

round head...under 50cc...square head over 66cc
 
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