enfield tranny. no primary.

[cumorglas]

I have been stalled in my project. i picked up an 85 kaw 454ltd which I destroyed with the intent of converting to diesel. yanclone arrived. i found a used comet 40 with driven and new belt on ebay for cheap. when i started to put things together was unhappy with how it fit together. i knew i would have to modify frame. i do jeep stuff and am not afraid of cutting and bending tube. but to make it fit would have required stretching too much for my taste. i also was not real pleased with tuning options on the 40 series cvt. after all of that the cvt was repurposed to a scout/buggy/tractor/skidder project.

i began looking for another transmission option. i loved the idea of the ultima with belt drive, but the tranny alone was more than i paid for the rest of the project. I haunted the local custom bike shops looking for the cast off 5 speed from all those ultima upgrades. the shops were geting as much for those as for the ultima!!! enfields just aren't common around here so it didn't even look like an option.

imagine my surprise when ebay emailed me with an actual hit from my saved search. an enfield transmission all by itself. and to make it even more perfect it was less than 12 miles from me. it had been sitting in a warehouse for thirty years and was well loved before it got there. 76$ and its now mine. it's missing the shift and kick lever. neutral lever is fine. also missing a couple bolts from case. some awful whitworth thread i assume.

clutch and primary long since gone. i am thinking of getting stock clutch basket and chain, an appropriate engine sprocket and machining my own primary. i haven't got one around to reference. which leads me to some questions.

what is the center to center distance from engine shaft to tranny shaft?

how does adjusting the primary chain work? does that affect how i design the primary case.? does it affect what i use for shaft seals and bearings?

does tranny lube leak into primary much?

how deep does the primary case have to be? yanclone has its own alt so i am really just worried about room for basket and chain.

how many teeth on the engine sprocket?

how long have people in the states had to wait for things like shift levers and clutches to mailed from india? recommendations on where?

i am going to have to ditch the belt drive to the rear wheel. which means a custom rear sprocket. recommendations there on how many teeth?

i am sure i could probably look this up somewhere but what chain size is the drive sprocket on an enfield?

thanks in advance for any or all answers.


grady

[Sphere]

Hi,

Please filter the questions you can answer yourself using this website:

http://www.tackeroo.com/Bullet%20Manual ... %20Manual/

I will be happy to come back to answer unanswered ones.

[cumorglas]

thank you!

it's gonna take a bit to read through it, and i fear it may cause as many new questions as it will answer, but that is exactly what i need right now.

Hi,

Please filter the questions you can answer yourself using this website:

http://www.tackeroo.com/Bullet%20Manual ... %20Manual/

I will be happy to come back to answer unanswered ones.

[cumorglas]

moved the ones i could answer myself to the end with their answers. deleted one i realized didn't matter because there is room for a shaft seal.

Sphere thanks again. if there had been no text that still would have been wonderful just for the exploded views.



what is the center to center distance from engine shaft to tranny shaft?

how deep does the primary case have to be? yanclone has its own alt so i am really just worried about room for basket and chain.

how long have people in the states had to wait for things like shift levers and clutches to mailed from india? recommendations on where?

i am going to have to ditch the belt drive to the rear wheel. which means a custom rear sprocket. recommendations there on how many teeth?

how does adjusting the primary chain work? does that affect how i design the primary case.? does it affect what i use for shaft seals and bearings?
super easy, yes, no

i am sure i could probably look this up somewhere but what chain size is the drive sprocket on an enfield?
5/8 pitch.

how many teeth on the engine sprocket?
25. 3/8 pitch double

[Sphere]

moved the ones i could answer myself to the end with their answers. deleted one i realized didn't matter because there is room for a shaft seal.

Sphere thanks again. if there had been no text that still would have been wonderful just for the exploded views.

what is the center to center distance from engine shaft to tranny shaft?

I don't know from the top of my head. Maybe I've got this written down somewhere. I think with a Hatz 1B40 I have 1.6 inches to spare. Since a Yanclone will have the same distance from centre of motor axle to the side (read this from drawings) it should be no problem. Please verify this for yourself.

how deep does the primary case have to be? yanclone has its own alt so i am really just worried about room for basket and chain.

Isn't the alternator built-in? I don't think there are any parts sticking out. In any event, if you don't care about centering the engine, use the petrol inner primary, otherwise buy a longer tranny shaft and an inner primary for a Taurus. Should set you back 120USD or similar. Note that the alternator isn't exactly know for its prowess, and there is a thread on this forum about rewinding the stator to get more amps. 40W isn't enough really.

how long have people in the states had to wait for things like shift levers and clutches to mailed from india? recommendations on where?

Dunno about delivery times, however before trying your luck on ebay you could also try http://www.jainenfield.com/ -- perhaps they can give you a better deal. In any event try to cluster your orders, otherwise delivery costs will kill you.

i am going to have to ditch the belt drive to the rear wheel. which means a custom rear sprocket. recommendations there on how many teeth?

Motor - Transmission: 25 - 56
Transmission - Rear Wheel: 19 - 38

That is the setup Altmann uses and it yields him 100km/h -- http://www.altmann.haan.de/riding_on_salad_oil/

In final drive the gearbox ratio is 1:1 so use these numbers to figure out what sprocket sizes you need.


how does adjusting the primary chain work? does that affect how i design the primary case.? does it affect what i use for shaft seals and bearings?
super easy, yes, no

i am sure i could probably look this up somewhere but what chain size is the drive sprocket on an enfield?
5/8 pitch. -- I think Diesel Dave uses el cheapo 530 chains.

how many teeth on the engine sprocket?
25. 3/8 pitch double

[cumorglas]

I have big chunks of alu that are dying to be vised into the big bridgeport mill and turned into my primary. i can't see spending a big chunk of change on either the petrol or taurus primary delivered to the us when neither is really what i need. plus i can then have proper shaft seals. i have both the engine and trans here. i do not yet have clutch or primary chain. I could just bolt the engine and tranny together however i liked, machine the primary however i liked and then have to make a custom length primary chain. not the end of the world. but the combination of engine teeth clutch teeth and whatever number of chain links is tried and true math. it works well and doesn't cause premature failure due to some links being more subject to power pulses than others.

if i had some one nearby with an enfield to take measurements off of, it would be no problem. lacking that i was hoping that there might be someone out there who was doing maintenance on theirs anyway and could measure the center to center on the shafts. i could then start layout without waiting for parts to come from india. i am probably not going to cover the floor with alu chips till the parts arrive. but i could sketch it and mock it up out of plywood while i wait. and then fit the assy into the frame of the kaw.

all of this is assuming it is going to take weeks for stuff to get here from india. if somebody here in the states has experience with getting parts i would love to hear about that. i just don't know.

grady.

[Sphere]

If I was lacking the enfield clutch and engine sprocket, I would find myself in a hurry to fit a belt drive. Why bother with a leaky primary if you don't have to. What I can do is measure centrecrank-edge and trannyaxle-edge and give you that. It should closely resemble the measurement your're looking for.

[cumorglas]

If I was lacking the enfield clutch and engine sprocket, I would find myself in a hurry to fit a belt drive. Why bother with a leaky primary if you don't have to. What I can do is measure centrecrank-edge and trannyaxle-edge and give you that. It should closely resemble the measurement your're looking for.

i would love to fit a belt primary. I have been looking for sometime though and haven't found a dry clutch suitable for belt use for enfield tranny that costs less than a thousand dollars. would be REALLY happy to be wrong. for a thousand dollars i can buy an ultima 6 speed and belt primary together.


if you can make the measurement without cracking open your primary that would help. but i wouldn't open it up just on my account.

[Sphere]

I don't know what a dry clutch costs, but apparently a low cost beltdrive would use the 2:1 belt drive wheel set from car engines. Ask me not how or what, because I don't know. I have dismissed this idea since it wasn't possible to machine the clutch housing to make it fit. So the belt drive part might not be too expensive.

Tomorrow I will see if I can take the measurements for you.

[Sphere]

The distance between centre axles measures roughly 23cm or 9 inches. Note that I measured the shortest distance, not horizontally, since the block was sitting on a trolley.

[cumorglas]

that's a great start. thanks!

look out plywood here's the band saw.