I have tried without success to track down a replacement flywheel to replace the knackered 210mm one on my type 4 1700 CB engine. So far no luck. I was wondering if I could fit a 215mm? Does anyone know the differences (inner/outer clutch facing and overall diameter)? Can I do this? Will my starter still fit? Is there anything else I need to think about or anything else I could do to resolve my problem. This is the knackered one!
Yes it fits, no other changes necessary, aside from having to get the clutch kit to match. That flywheel has loads of life left in it...
@Joker so you don't think I need a new flywheel? @davidoft said that the heat cracking meant it was unusable?
It's all about the bellhousing, any type 4 flywheel with matching clutch will fit the engine, what year and what gearbox is it?
The overall flywheel diameter is the same, the difference is the thickness of the pressure plate... the bigger diameter clutches actually stick further into the bell housing, so a late clutch in an early box will actually bind up on the clutch release arm area...
@Flakey and @Paul Weeding thanks, but i am getting confused, that doesn't take much. Flakey I don't know what gearbox it is … is there an easy way to work this out. and Paul I think what you are saying is I can't use a 215mm flywheel with a 215mm clutch but can I use a 215mm flywheel with a 210 clutch … It's just that I don't want to splash out on loads of new bits to find they don't all go together with the existing engine/bell housing/gearbox. My wife thinks these old campers are great fun, and then leaves the sorting it all out to me Its a November 1971 built cross over with a 1700 type 4 engine (CB) if that makes any difference?
How many strengthening ribs are cast into the top of the gearbox,3,5 or 6? There will be a code stamped on the casing somewhere, sometimes takes a bit of scaping around in the crud to find, but that will give us the info to tell what box you've got.
But if he uses the correct clutch for the engine/ gearbox and a larger diameter flywheel hole, ie 215 not 210 will it all mate up ? I think it will but have not got anything to compare
What I'm trying to say is its a 43 year old vehicle,unless he's had it from new or knows its entire history it could have had any gearbox fitted during its life, until we know what box it is we cant easily say for sure which clutch will fit.
I would say not... the clutch cover stud pattern will be 5mm different, so it won't physically bolt on!!
That's the point, I don't think they are, from a purely financial point of view when manufacturing it's easier /cheaper just to make the hole bigger rather than make several different flywheels, it's generally not the way car parts are produced, so back to the original question, anyone got a few flywheels and a few clutched to try out , the bell housing is huge compared to the clutch I don't see it would catch, 1600s have different clutches for early and late gearboxes but they fit any engine . Also if you look at a type 4 flywheel, there's really not all that much space on the outer lip to alter the bolt position
2.5mm difference on each hole... not a lot, but enough for it to be different!! But I will have a look at what I have on the shelf, as I have a 215 and 228 flywheel, and possibly a 210 clutch
@Paul Weeding if you were able to have a look at the 210 clutch against the 215 flywheel and then let us know that would be mucho appreciated.
