YPVS stator bolts Plus Clutch Springs Plus Clutch Bolts !!!

[headcoats]

What can I use for attaching the stator to the cases ?
Could I use Allen bolts or maybe low profile ones or does anyone have the part number for genuine ?

[Deleted]

I thought nk they are just an M6 hex hd bolt, not sure what length though

[headcoats]

Just not sure how much gap there is when you fit flywheel
The plate isn't adjustable like LCS so once on it doesn't need adjusting for the timing

[dusty350]

If you want genuine Yam, the bolt is 97024 06020. Fowlers have them at 91p each. Washers are 90201 06042. £1.61 each, in stock too.

Dusty

[headcoats]

Cheers dusty

So the code is saying they are M6 x 20mm long

[oldbritguy]

I have just fitted new ones on my rebuild

Pic of one of the old ones and plate washer for ref

[headcoats]

Cheers
Got a bag of clutch springs with about 3 different types in next !
I want to fit 3 standard and 3 heavy duty ones

[midlifecrisisrd]

Aug 6, 2019 14:32:12 GMT 1 headcoats said:

Cheers
Got a bag of clutch springs with about 3 different types in next !
I want to fit 3 standard and 3 heavy duty ones

Standard usually have some yellow paint on them

Steve

[headcoats]

Might have to buy 3 standard springs then !

LC manual says 34.9mm free length but YPVS book says 36.4mm !

Thought they were the same

So any aftermarket ones (heavy Duty types) would need to be LC or YPVS specific but not both ?

Just to be square I have

34.50

32.81

35.38

34.28

42.38

42.26

41.78

42.44

35.22

35.55

34.74

35.41

So according to that , they are good for the bin !

[wallcraft]

Your gonna need 3 TZ springs at least if your running the Athena top end.

[dusty350]

Just cross referenced an Lc and Pv F2 parts fiche. Different part numbers for the clutch springs between bikes, so they are different.

Dusty

[headcoats]

Do you have the part number for the ypvs ones Dusty

[dusty350]

Yep, F2 Pv - 90501 23138.

Dusty

[headcoats]

Cheers !
Anyone know the TZ springs part number ?
I guess there are different models over the years ?

[cb250g5]

If you want to check spring rates, put 2, end-end, in a vice and slowly squeeze, the lighter one will close up 1st.

[headcoats]

www.ebay.co.uk/itm/Yamaha-TZ250-91-99-Clutch-Spring-Gen-Yam-New/273377840493?epid=651955993&hash=item3fa696cd6d:m:mMlOGDrt3aejY2gEa-7J5Gw

Dennis Trollope Racing has TZ springs but same part number as the YPVS ones just to confuse things !

I just need 3 standard ones and 3 stiffer ones  (EBC maybe ?)

Anyone got 3 stiff ones from a set they didn't use ooh err :-)

[headcoats]

Just ordered some EBC heavy duty springs and the bloke said they measured 36mm even though they are advertised for LCS YPVS and RD 400 !

So just need 3 standard ones now

[Tobyjugs]

Aug 7, 2019 8:30:02 GMT 1 cb250g5 said:

If you want to check spring rates, put 2, end-end, in a vice and slowly squeeze, the lighter one will close up 1st.

That's a great tip. The last time I spent ages staffing around with a weight and measuring the compression.

[cb250g5]

Aug 8, 2019 9:13:08 GMT 1 Tobyjugs said:

Aug 7, 2019 8:30:02 GMT 1 cb250g5 said:

If you want to check spring rates, put 2, end-end, in a vice and slowly squeeze, the lighter one will close up 1st.

That's a great tip. The last time I spent ages staffing around with a weight and measuring the compression.

Should have said, stick a 2p or washer or something between them as well, rather than trying to get the coils lined up exactly.

I had a bag full, some were supposed to be HD ones, but all mixed up, so I just graded them from light to heavy & chose the ones I wanted.

In the end I think I settled on lightest springs, but the meatier plates, from the big diesels, and all is well. Don't want a heavy pull, the T140 used to kill my hand in traffic.

[headcoats]

Bloke used to come to the local meets on a hybrid and had 6 heavy duty springs on a stubby clutch lever and you could hardly pull it in 😱