UK Monster Owners Club Forum » .: Technical :. » Engines, Clutch, Gears » sprag clutch replacement

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Old 06-04-2020, 03:43 PM   #16
Darren69
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Originally Posted by slob View Post
Maybe they are, I only have the 01 parts book and the link referred to 02 S4
My 03 DS manual shows a c-clamp type holder.
It could just be the recommended tool changed.
I was erring on the side of caution, since I wouldn’t want to advise spending fifty quid on the wrong tool.
Just checked in my '02 Monster workshop manual and it refers to tool 88713.2036 which indeed looks like a c-shape that bolts to the crankcase.

This one refers to 2 equivalent numbers bit pricey though!

https://www.ebay.co.uk/itm/Flywheel-...-/163670079486
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Old 06-04-2020, 03:44 PM   #17
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Looks like the factory changed the tool in 02 then, the one I linked to is the GB Products equivalent.
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Old 06-04-2020, 06:05 PM   #18
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My bike was registered Feb 2002, it was one of the challenge bikes so I imagine they all came from the factory at the same time (and it wasn't old stock from a dealer showroom).

I've emailed the ebay vendor (mike - very helpful) and he says Ducati Flywheels had different diameters for that year. I'm going to split the cases and send him the dimensions to check and make sure.

It's never easy is it
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Old 06-04-2020, 06:11 PM   #19
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I think this might be the item......

https://www.ebay.co.uk/itm/Ducati-Mo...0AAMXQn11RbSsk
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Old 06-04-2020, 06:26 PM   #20
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88713.2036 is the same part number listed in the '02 manual, so I think they're the same and your dealer friend maybe getting the type of flywheel mixed up with the earlier single phase change over which occurred a few years earlier on the 916 possibly? AFAIK all S4 had the 3 phase type which I thought was the same as all ST4/Monster/996 and the later 2v IE bikes (ST2/900SSie/Monster S). Some of the 2V ones (like the '01 900Sie) could have had a bit of a mixture depending on model and year so it's a bit less clear cut with those, since the factory was in the process of the TPG takeover around that time but they should I would have thought matched engine with frame type. It's probably worth checking just in case anyway.
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Old 06-04-2020, 07:45 PM   #21
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I bought a Laser tools locking tool when i did the sprag on mine. It didn’t fit. When compared to a genuine Ducati tool at a local independent, a locating pin was welded on, off centre.
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Old 06-04-2020, 08:09 PM   #22
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And the Laser tools ones are twice the price of most of the others. If matey boy's £26 ebay tool does the same job then get that one. I can't actually see any locating pins on his though so I don't know how it works? Plenty of pics with it on different bikes, but none showing how it locks the flywheel!
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Old 07-04-2020, 09:39 AM   #23
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An old tip from a mechanic and also seen on some ducati websites ,, use a 2p coin to lock the starter gears to release the flywheel alternator nut
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Old 07-04-2020, 10:03 AM   #24
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An old tip from a mechanic and also seen on some ducati websites ,, use a 2p coin to lock the starter gears to release the flywheel alternator nut
I’d avoid that technique where possible. We used to use it on two stroke primary drives. The gears on the primary/clutch side are much chunkier, also you’re putting massive pressure on the bearings.
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Old 07-04-2020, 03:21 PM   #25
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I used a 12v rattle gun to take the flywheel off my old 900 when the sprag died, and I didn't need to use a holding tool when taking it off, just make sure you use impact sockets...

I've now got a plug in Clarke Impact Wrench after my old 12V one died trying to get 30 year old wheel nuts off my pickup and it's great ! Makes changing wheels, removing rusty suspension and caliper bolts a doddle.

From memory, it took 3 goes to get the right bits from Ducati though, each time getting slightly more expensive (and I may have put the flywheel back on wrong once as well which didn't help )
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Old 07-04-2020, 03:52 PM   #26
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It’s more for torquing the flywheel nut back up, it’s needed.
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Old 07-04-2020, 05:59 PM   #27
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Haynes manual (748, 916, 996 up to 2001) suggests putting the bike in gear and having an "assistant" pressing on the back brake. Still think I'll go for the holding tool all the same.
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Old 09-04-2020, 07:35 PM   #28
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The point of no return!



Ordered all the bits from moto rapido (excellent service from Luke BTW with a 10% UKMOC discount). Couple of items need to come from Ducati, they are still running the spares side of the business in Italy so hope to get the parts next week.

Still investigating flywheel holding options.

Also discovered my sockets are not deep enough to locate around the nut, any suggestions, can you purchase them separately?
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Old 09-04-2020, 07:46 PM   #29
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absolutely, eg
https://www.ebay.co.uk/itm/32mm-DEEP...-/251915333636
can’t remember the size but I have a feeling it’s 32mm, can you get a caliper in the to check, if not use a large adjustable spanner as a size gauge
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Old 09-04-2020, 08:18 PM   #30
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I think it's 30mm, Rob, but, as you say, easy enough to check. Also, measure the depth from the base of the nut to the end of the shaft to make sure the new socket is going to be deep enough (you can also get extra-deep sockets). Machine Mart do them but there are plenty alternatives out there on eBay/Amazon.

https://www.machinemart.co.uk/p/lase...lf-inch-drive/
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