[Urgent] L100/Enfield Mounting & Throttle Issue

[snoopy]

I've travelled from Newcastle to Nice, France and have two major issues.

1. my engine is mounted to the lower gearbox holes but not the top. I've noticed that the primary drive chain if squeezed can actually pull the gearbox (and frame!) which is sure to put stress on the chain and the seal behind the clutch - mine has failed. It's 5mm steel plate so no flex at the bottom. Plating to the top gearbox holes would have definately helped but I suspect the best solution is a spacer between the top part of the gearbox and the engine to prevent this flex inwards. Right?

2. the throttle is a big concern for the motorway as mine is way too hard and is really aching my hand. There are two springs the one that does the return doesn't appear to get strained too much as the lever rotates. The other one does but more so as the speed increases and is probably the issue. As the speed of the engine increases the spring is having to stretch more as the lever applies more force. In affect I am throttling the engine lever force and the stretch in the spring.

So what is the solution to this? For the moment I have stuck a cable tie through the spring to limit its stretch at higher load. I'm hoping my hand throttle will therefore transfer the force to the engine lever. I'll try this on my way to Monaco today.

Cheers, Andrew

[royaldragon]

I wonder what other enfield converters have done.

[royaldragon]

Andrew I as well am working on a solution for this. I have not finished my build but that has concerned me not having my gearbox mounted in any way connecting to the engine. There's not much holding the gearbox on as the Enfields were designed to have the majority of support for the gearbox on the 4 bolts to the engine.
My thought was a plate bolted to the box and a brace to my engine. There were a couple things mounted to my 13hp winsun that I removed I am thinking if I design it right I could have at least one brace screwed into the engine. I have to look at it more though. I don't know what your engine looks like but I know ours are similar. I am wondering if it is possible to make a plate with some guessets on the bottom to ad stability. Let me know if you come up with a solution and if I come up with something I think will work I will share whAt I have done as well.

[snoopy]

At the moment I've not found a solution but what I can say is the primary chain pulls the entire engine rearwards enough to destroy the seal behind the clutch, twice.

I'm beefing up my top engine supports and adding one to the front. I've also welded the lower right engine frame directly to the rear frame to counteract the gearbox pivot design.

[snoopy]

On the throttle issue, I have thrown away the throttle spring which means;

a) idle isn't possible
b) the throttle travel is reduced and
c) you are not pulling the spring when the engine governor is already at its maximum

This make a big difference to the throttle force needed to sustain the top end. As all 404 owners know the force needed to sustain over 55mph is painful over long distance. Charles (Salad Oil Enfield on google) tried to drill holes in the governing flywheel, gave up and tried making the lever longer. This is the only thing I have left.

[Sphere]

Perhaps you can add a spring to your throttle handle? This is a good way of using a bit of length to allow the engine to shutdown without a solenoid, but it also helps for idle.

Do you have pics of the throttle on the engine side?

[snoopy]

I'll see if I can get a picture took. At the moment the plan is to extend the lever to increase the moment and to get some sort of throttle cruise for the handlebar. I was told Harleys have something like what I need.

[snoopy]

You might find a picture here: http://www.advrider.com/forums/showthread.php?t=623129

[andrewaust]

Totally agree snoopy, I think it was Stuart that gave me the thumbs up on the cramp buster for the throttle, as we know how much pull that governor has when your trying to get maximum power. My idle is adjusted by the throttle unit, I replaced the Enfield unit with a Motocross one that has a good adjustment. When warm I've got the engine idle at approx 1200rpm, the nominated best rpm from the manual.


A

[Sphere]

Funny, I have two springs connected to the lever at the engine so it will return to idle. My hand was a bit numb after 350km yesterday, but I expect it to return to full function this afternoon