Motoscrubs.com

Hi all,

My first post on Motoscrubs. Hope this is in the right forum.

I've been trying to find a new 32T rear sprocket for my '72 450 desmo. I've tried all the on-line suppliers I can think of but so far drawn a blank. Anyone know who stocks these?

Lex

LexH wrote:Hi all,

My first post on Motoscrubs. Hope this is in the right forum.

I've been trying to find a new 32T rear sprocket for my '72 450 desmo. I've tried all the on-line suppliers I can think of but so far drawn a blank. Anyone know who stocks these?

Lex

Are you wanting to stay with the 530 chain or change to 428?

Nigel can prob get you what you want, send them an email. https://www.laceyducati.com

Oh and welcome.

____ Here's a link to another/older related thread.
viewtopic.php?f=3&t=402


Dukaddy-DUKEs,
-Bob

Thanks guys. I asked Nigel Lacey, he normally stocks them but is currently awaiting new stock. I also discovered that Phil Hitchcock at Road and Race usually stocks them but is also out of stock at present. My 450 has 530 chain and currently has a 34T plastic sprocket that a previous owner put on it and I can't wait to get rid of . The gearing is too high and also the plastic sprocket has special shouldered spacers for each mounting bolt that prevent the sprocket from being crushed when the bolts are tightened but are also effectively very thick washers under the bolt heads and so the bolt heads stick out too far and foul the swingarm. I have a lovely deep gouge in the swingarm tube (ground out with an angle grinder by the looks of it) thanks to the genius who fitted this sprocket.

Just for the info of any other 450 owners looking for sprockets, I got a new 530/12T engine sprocket from Barry and Angela Jones at Classic Ducati. There are some other suppliers who have these as well.

Cheers,
Lex

" My 450 has 530 chain and currently has a 34T plastic sprocket that a previous owner put on it and I can't wait to get rid of . The gearing is too high "

____ Do you really think you're gearing is too "high" ? _ That gearing -(34/12) is in-between the higher-gearing (32/12) of a stock 450-Mk3 and the lower-gearing (35/12) of a 450-Scrambler.
I'd prefer higher 32/13 gearing for a 450 that's to be ridden mostly at highway-speeds !


" I got a new 530/12T engine sprocket "

____ Those smaller 12t-sprockets ought to be avoided, as they tend to more quickly wear-out their chains, (not to mention themselves), as well as absorb more power in the process.


Dukaddy-DUKEs,
-Bob

Thanks Bob. What I mean is that the 12:34 ratio (2.83) feels too high to me for road use. i.e. the motor is spinning too fast for a given road speed. For me the standard 12:32 ratio (2.67) seems like a good compromise for urban/highway road use. 13:32 (2.46) seems a bit low, although I haven't tried it. I suppose if 13T is preferred for wear reduction, one could consider 13:35 (2.69) which is very close to standard. Again something I haven't tried.

Some may call a high ratio low gearing and vice-versa, it's just semantics I guess. Hope I've explained myself though.

" 13:32 (2.46) seems a bit low, although I haven't tried it. "

____ The 32/13 is nice for a 450 (that's in no quick-hurry).
I have a n-c 350 with 33/15, and I much enjoy that gearing for long-cruising.


" I suppose if 13T is preferred for wear reduction, one could consider 13:35 (2.69) which is very close to standard. "

____ BTW, 14t is the largest size that'll fit a wide-case motor, however if the chain is allowed to be too loose, the chain then too easily cuts grooves into the case-material.


" Some may call a high ratio low gearing and vice-versa, it's just semantics I guess. "

____ Well not too much actually, as I'm sure that the vast-majority "feel" that 1st-gear is as lower-gearing, and that 5th-gear is as higher-gearing, so if the overall-gearing is raised-up, (thus lowering the 'ratio'), to relatively decrease RPMs,, then the gearing must then be considered as having been made 'higher', (like shifting from 4th to 5th does).


" Hope I've explained myself though. "

____ Well of-course what you actually had meant, was assumed,, but it's not the common-way that's been long established for referring to such, (otherwise 1st-gear would've been otherwise known as 'high-gear', rather than "low-gear").
So when you indicated that the 34t was "too high", that would then have me think that you'd thus prefer for your 5th-gear to become more like the (lower) 4th-gear,, and that of-course didn't well correlate with you're desire for a 32t-sprocket (which would RAISE your gearing up even higher).
So, I figured this issue ought to be gone-over.


Dukaddy-DUKEs,
-Bob