Im given her all shes got captain

[PeteJ]

Got the 78cc gasbike trike kit which starts and runs great but damn its slow. 15 mph on flat ground 14 on a slight upgrade and a screaming 17.8 on a downgrade. I know that might be blazing speeds to you guys but I believe it should do at least 20.
Only things I have done to it is is to run the throttle linkage to the actual throttle arm not the governor arm and
I also put a zip tie on governor spring. Both stock and with my throttle linkage mod it still runs the same speed.
i have it on a schwinn meridian with a 42 tooth sprocket which dont seem to heavy and I am 220. Question is is that as fast as a 78cc will go or is something wrong?
Thanks for any and all help Pete J

 

[Sidewinder Jerry]

Your trike doesn't look like it has a differential on the axle. Which means you wouldn't be able to handle speeds over 20 mph. The engine drive system looks like it has a centrifugal clutch with a sprocket ran to a sprocket connected to the axle. You probably don't have enough reduction and are putting way too much strain on the engine robbing it of power.

 

[PeteJ]

That is exactly what it is. Small sprocket on the clutch to large sprocket on wheel. I have seen a lot of the meridians with the predator 212 on them and the predator goes on sale next week. Would that be a much better option or just to much for that bike? or are there better ways to fix what I have? and again Thanks a lot for your help

 

[PeteJ]

Just in case info needed axel has one wheel on right hand side that the petals drive other side just spins freely.

 

[Sidewinder Jerry]

You may want to use a gearbox or CVT to get you where the reduction is more appropriate.

 

[Venice Motor Bikes]

Those little 78cc engine are GUTLESS!! All you're going to do is spend countless hours & $$$ just to 'hopefully' get it up to 20 MPH.

The easiest solution is to swap a 212 Predator onto it! (you'll be very happy that you did).

 

[PeteJ]

Those little 78cc engine are GUTLESS!! All you're going to do is spend countless hours & $$$ just to 'hopefully' get it up to 20 MPH.

The easiest solution is to swap a 212 Predator onto it! (you'll be very happy that you did).

I would have to agree and gutless would be an understatement

 

[PeteJ]

The sprockets now use a 415 chain and looking at all the clutches for a 212cc motor they all come with different size chains. Will a 420 or other size chain work on the same sprocket thats on there or do I need to order a lower sprocket to? Thanks again

 

[Sidewinder Jerry]

I'd advise a 30 mph max speed using the 212 on a trike. Since you're only driving the left wheel which will make you prone to flipping when making high speed left turns. To have a top speed with the 212 you'd need a 9\1 total reduction. You can accomplish this by installing a double sprocket jackshaft. Meaning you'd need 2 chains. It'd be ran like this:

Clutch 10t > JS 30t | JS 10t > Wheel 30t

 

[PeteJ]

I no doubt believe you on tipping it seems as if it would be easy to do now and will be lookin into clutch now. thanks

 

[PeteJ]

As of now I will leave trike as is its plenty fast enough for my old lady to scoot around on and as for me I will start searching for a 2 wheel bike and make a gnarly 2 smoke butt hauling speed demon. This is my very first attempt at a gas bike and I got the bug so stay tuned