Hi from the Forest of Dean (England UK)

mostyn56 · #1 11-19-2008, 03:07 PM

I love this site & have spent many hours reading the forums etc.
I have recently built a "Happy Time - Starfire GT4 67cc" based Mountain Bike. I only want to use the bike off-road, as the area I live is mainly forest & very hilly. After fitting the engine, I found the gearing was way too high for most of the terrain. I've now geared it down by making a jackshaft between the engine & rear wheel sprocket. Now I can burble up the steep tracks with my trusty Collie (Cody) leading the way!!!
I've done a few other mods/improvements also, but now I'm keen to try & develop a centrifugal clutch type engine to suit my needs. It's quite funny really that everyone wants to go faster & I just want to go slower!!!
I do think that the shifter kit from sickbikeparts is brilliant, well designed & engineered to a very high standard. That kit gives you the best of both worlds - fast top end & great hill climbing ability. I'm saving my pennies at the moment to get the kit cause I want to be able to go faster as well!!
Best Wishes to you all
Shaun.

Spunout · #2 11-19-2008, 05:20 PM

welcome shaun! good intro

**Ilikeabikea** · #3 11-19-2008, 05:24 PM

Welcome to the fourm. Glad you joined us. You'll like it here.................

jasonh · #4 11-19-2008, 05:24 PM

Welcome to the forum.

There is a pullstart/centrifugal clutch kit available for these motors. I've seen them on ebay.

mostyn56 · #5 11-20-2008, 05:59 AM

Thanks for the welcome one & all.

Yes jasonh, they do sell them on ebay. I don't know anyone whose had one fitted to see how well they would work on steep hills. I'm thinking they would tend to overheat. If anyone has any experience with these I'd like to hear from them.

jasonh · #6 11-20-2008, 09:40 AM

1000w has one on his cruiser.

http://motorbicycling.com/f26/two-st...iser-2916.html

**Dave31** · #7 11-20-2008, 01:28 PM

Welcome to the forum

mostyn56 · #8 11-21-2008, 01:51 PM

Thanks for the help jasonh, I've ordered a centrifugal clutch & pullstart off ebay today.

jasonh · #9 11-21-2008, 02:57 PM

Cool. You may need wide crank arms or be able to move the motor upwards in the frame I think. Just something to keep in mind...

mostyn56 · #10 11-22-2008, 06:51 AM

Thanks jasonh, you're spot on with that info. When I receive the kit I'll decide which way to go. Can you buy a wider than standard crankshaft so I could use my own pedals? Anyway I'll have to wait for it to arrive before I know how much more length I need.