Launtop powered Enfield finally on the road

[Ih8Suvs]

Well I finally have my Launtop (Chinese Yanmar clone) powered Enfield Bullet running and on the road. I still have to take it back apart to pretty up and paint the mounts and such, but so far no problems. I made a bearing carrier holding a sealed ball bearing that fits inside the primary case to provide extra support for the longer transmission input shaft as well as seal the primary case. So far it seems to be doing its job, absolutely no leaks from the primary anywhere. Well, not true at first, I forgot to vent the primary case and as it got warm and the air inside expanded it pushed fluid out the cover o-ring, but once vented it is dry as a bone. Interesting is even when not vented there were no leaks around the transmission input shaft.
The Yanmar 15 amp dynamo connected through the existing Enfield rectifier and regulator is working well so far. Plenty of power to run the headlight even at slow speeds around town. Works better than the stock Enfield charging system I believe.
Top speed seen so far is an indicated 65 mph on level ground with no wind, which according to another Enfield owner in town is an honest 58 mph. This is with a 19 tooth countershaft sprocket. Fuel ecomomy on one fill (hardly long enough to tell for sure) was 148 mpg.

I may play with injector timing some more. The Yanmar service manual I have says it should be 12-14 degrees BTDC for the L100 Series. Launtop says 21-22 degrees, which is where mine was set from the factory. Just for kicks I set it to the Yanmar spec. I don't know how this has affected fuel consumption (the 148 mpg was with the Yanmar spec timing), it has had no perceptable change in power, but cumbustion knocking is somewhat reduced. I did this as a result of another friend in my town who experienced a broken top ring land in a chinese clone (no-name). Also this engine wasn't installed in a motorcycle. His fix was to install a Yanmar piston and retard the timing.

I tell yah one other thing, this Launtop is the easiest starting engine I have seen. It never fails to start with one kick over compression. And I thought I might need an electric starter lol. I was actually shopping for them, luckily I didn't buy one.

[andrewaust]

Hay that's great you have the bike on the road, as you said they take a little fiddling and tweaking in some areas, but I think they are a great little engine.

I backed the fuel off a bit as the engine was over fueling loosing power and produced heaps of smoke.

I'm still running the 17 tooth sprocket and get around 95-100 klm's tops. Once I seen the speedo hit 110 and nearly fell off the bike. I think the speedo was doing tricks that day.

The stator is a little weak on my beast, might have to look into a Yanmar replacement later on. Seems OK at speed, but idling it could be better.

Enjoy your ride, and I'm sure you'll get far more attention then many other pettie bikes out there The servo trick always gets them looking "Hay look at that dude putting diesel in his motorcycle"



Cheers


Andrew