Frame-Mount 4-Stroke Source? YES!

[gone_fishin]

relentless but effective

i have a positive impression that you care about this, and it may not seem so, but i do, too.

EDIT: as far as i'm concerned as admin, i'm now satisfied birddog's intentions are good. as a consumer i hope i continue to hear such good things about his service. maybe the rift can start to heal, to everyone's benefit

 

[blackmikeybikey]

low speed jerk(fix)

ratroder,

That seems to be the million dollar question right now. I'll offer what I know, but please understand that these have only been on the market for a short time.

The factory claims the clutch does not need lubrication. However...because the 4 stroke engine only delivers a power stroke every other revolution of the crank shaft, the clutch engagement can be "choppy" or jerky at lower speeds.

If a small amount (4 to 6 oz) of heavy gear oil is added this seems to alleviate the problem--at least for a while. The gasket on the gear box cover does not provide a liquid seal, but the heavier gear oil seems to stay in pretty well. The clutch will slip a little at first, but after it burns off the excess oil it seems to provide a fairly good balance between jerking and slipping.

I'm sorry that I can't offer a more definitive answer, but I am 75% sure that we will be moving to a lubricated clutch in the future.

I found out that if you run the kit without oil for about a week then add 5oz
of 90/1435 gear oil this makes the bike run SMOOTH as SLIK at any speed!!
I have about 350 mile on the bike .
later/ Mbikey

 

[birddog]

Awesome...thanks for the input. I think I am going to start recommending lubrication.

 

[HoughMade]

I've only got test mileage on mine- not many at all, but I have been running high temp wheel bearing grease only and while initial engagement can be a tad jerky- remember that there is a centrifugal clutch in there- engage the gearbox BEFORE revving up the engine and you will see that it works fairly smoothly. I am fairly certain I have the same gearbox sold on the site linked at the beginning.

 

[birddog]

Thanks for your input. I haven't had a lot of problems with mine either, but it is definitely smoother when lubricated. I think the fact that the four stroke only has a power cycle every other revolution inherently lends itself to a jerkier ride. The minimal slippage provided by the gear oil makes it uber smooth and I imagine extends the life of the clutch.

 

[wavygravy]

who is the maker of the engine josh? & can other engines mount up with your kit? thanks in advance!

 

[alesterfeind]

I was wondering the same thing. Would the big Honda GX50 fit?

 

[birddog]

The engine is made by the HuaSheng factory. The gearbox we sell will definitely fit the Honda GXH50. The HuaSheng engine is basically a clone of the Honda. As far as I know those are the only 2 engines that are compatible.

 

[nsideus]

I have over 500 mi on a grubee II. I use a grease oil mix. Pack the gear box with grease and inject oil through a hole I drilled near the clutch.

 

[Dockspa1]

nsideus, ever have any clutch slippage?
doc