Please help me get started

why a 2stroke as the 4strokes have less problems and last longer and no mixing gas with oil?

have you checked what your local laws are and whats legal to build?

the 142 hs its a honda clone made in china with the 4G trans and a shift kit from sickbikeparts


same set up as above but a honda GX50 motor


99cc predator from harborfreight and a CVT
if you don't like the slanted 99cc one of these http://www.surpluscenter.com/item.asp?item=28-1623&catname=engines


if the cvt don't meet what you want theres the Qmatic from EZm and the jackshaft kit from AGK


http://www.affordablegokarts.com/mm...e_Code=A&Product_Code=2600&Category_Code=99cc

depends on the look your going for and how much you think you can get away with

I think the shift kit from SBP that Yank was talking about will give you the gearing to handle the hills. As long as the bikes gearing was there.

the nuvinci hubs do not do real well when used behind a motor
many people on this site love the shift kits that SBP sells
if you blow up a 7 speed freewheel is at the most $30 part nuvinci is over $200
the shiftkit just uses parts already on the Bicycle to put the power to the wheel

start with a good quality mountian bike with a steel frame

nothing is perfect theres going to be trade offs as you are putting a motor on a bicycle that was never ment to have a motor on it


that being said yes you will wear out chains faster with the motor then just pedaling
but it is the best way to install a motor on a multispeed bike and not use a ragjoint
and keep the rear disk brake if the bike has one

always a staton kit
but you would have to order the honda from somewhere else as honda does not want their motors to be sold on gokarts gopeds or motorized bicycle
http://www.staton-inc.com/store/cat..._Gear_Chain_Drive_Engine_Motor_Kits-15-1.html

I forgot bullets said:

I did check out the shift kit.
It doesn't make sense to me to strain a bikes standard derailer to that point.
This is why Im lookin at the nuvinci, it would eliminate the chain having to gap multiple gears, would that help?
But now I know what I'm using if it doesn't

Click to expand...

We talked in PM, you want to build a shifter yourself that will handle a lot of elevation change in CO and be reliable correct?

You picked a bad time to start that project, me too it seems, I can't even find a good new 4S motor and tranny, I called Nationwide Access LLC (sikebikes/kings) direct today and they are telling me 2-4 weeks before new 4-stroke kits come in.

Even worse for me I guess since I already ordered a 4S SBP shift kit and it's on it's way.

About the NuVinci CVP internal shifting hub, and this is 1st hand experienced knowledge...

They simply won't hold up to a powerful 2-stroke motor with no 'cush' for long, I am seeing a darn near 70% failure on the few a friend and I built in 100 miles if not sooner, like 10 miles in one case.

I do however believe a more 'cushed' lower HP 4-stroke drive would be OK for a NV hub to handle so I am keeping that option open, but after riding mine for months I found the shifting I tended to constantly do annoying, I mean really annoying, and just use a 3-speed internal now.
If the motor has enough power to cover an entire gear range and then some, 3 gears is plenty for my desert riding.

You might want to look into a 5-speed internal Strumey-Archer hub for under $100 for you mountain riding needs, the total drive ratio range is only a bit larger than 3-speed, but that 1-3 range should make short work of your uphill climbs, and then an insane ratio for speed on the downhill side if want ;-}

http://www.bicycle-engines.com/49cc-belt-drive-complete-powered-engine-p-320.html

4g kit

http://www.sickbikeparts.com/catalo...ucts_id=110&osCsid=4fp2es19ped5og4kckfq1sgnj6
4stroke shift kit

easiest is a hardtailed mountian bike like a trek or diamond back
garyfisher any of them with a steel frame

shhh don't tell anyone I helped you as I do have a rep to maintain....

While you're at it you might want to consider a shock absorber seat post. They will make your bike feel like it is a full suspension. Well maybe not quite full suspension but better than a soft tail and lots better than a hard tail. I'm naturally assuming you're going with a front shock type mountain bike.