Flywheel weight removal..........

ah, that's this mod out of the window then.
I heard about inmproved engine acceleration and reduced engine braking and wondered if such a mod might streamline my move from an RS250 to a Mille.
Ho hum, I didn't want to start tearing down a bike I haven't seen yet, anyway .

Has anyone tried this on a gen 1? If so was it worth he gain?

hey W00dzy

it doesn't look a difficult job to do this for the 1998 to 2003 flywheels. i have been studying flywheels from 1998-03 and 2004 onwards. The weight on the gen 1 flywheel is not so big as the 2004 models, so i don't know if you would gain as much as removing the flywheel on the 2004? but for sure you would gain something. Anyways, the weight is fix by 6 permanent pressed rivets? (instead of allen key bolts on the 2004s). to remove this weight, you would have to drill these 6 rivets? (whatever they are) which are casted to the weight out. 5 minutes job. take at look at this to study. its a good brake down to see the 1998 - 03 flywheel

How to replace your sprag clutch.

the problem you have after is that the weight was used to as part of the sprag-clutch for spacing. soooo. you can solve this with replacing the weight with 3 nuts or spacers where the 3 bolts go that hold the sprag clutch. In fact, it is possible to have 6 bolts if you want just drill the 3 extra holes (just like 2004 flywheel) of course these 3 nuts/spacers have to be the exact same width as the old weight you have removed. take a look at this site. this well help you understand what i mean with the 6 nuts on the 2004 flywheel

Tuono Flywheel - JOE250.com

i am pretty handy when it comes to this kinda stuff. i am pretty confident it can be done with out much effort. if you can repack your exhaust, then you can do this. because after all, you have to drill out your rivets too to take apart the exhaust. it just of matter of using a centre punch and a drill and taking your time.

I have to replace my alternator gasket soon. i found a small leak. so. for sure i will give this a bash.

I hope this helps anyone out there willing to give it a try. i spent days studying the differences between the 2 flywheels.

let me know if you anyone does this before me

Paul.. my first post too :thumbup

looking again at the 98-03 flywheel, you might need a spacer behind the sprag clutch to replace the space lost by the weight removal???

it would be nice if i could get my hands on a 2nd flywheel?? anyone got one?

Cheers.. let us know how you get on! I am now also looking for a second hand flywheel..

w00dzy said:

Cheers.. let us know how you get on! I am now also looking for a second hand flywheel..

Click to expand...

here's another query?? would a 2004 flywheel work with the 1998 - 03s??? 1998 - 03 flywheels are proving very rare to find

:angry

if you still have pics can you please mail them to me as i have to do mine many thanks rick [email protected]

please email me to0 - [email protected]


qoute from other forum :

I had the mod done on my trackbike earlier this year. The engine revs up noticeably quicker in neutral; not sure how much faster it is under load. Obviously it's quicker, but the difference isn't like "night and day". For the record I've had no issues with vibration or engine braking AT ALL. The only issue I can think of (and it's minor) is when the engine hasn't been warmed up properly. If you rev it hard then and let it drop back to idle then is will occasionally cut out. Can't imagine why you'd bother with for the road, but FWIW, I'd trust it

Slipper

great mod off to do it, no engine braking with Slipper clutch installed

hi dubai.. do you have done this mod?

its in the dealers for a service so I asked them to remove it, ill be done tomorrow, all good, next slipper clutch