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brian
Joined: 22 Aug 2011 Posts: 3769 Location: Australia
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Posted: Mon Jul 06, 2015 5:20 am Post subject: Forks |
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Forgive my non-Bimota question but thought you knowledgable chaps might be able to help.
I've just changed the fork seals in a CB250. Just wondering if you have to bleed the air out of the forks? I'm assuming that you just fill with the correct amount of fork oil and screw the cap on? I did work the cartridge up and down a few times with the cap off. I've been caught out the odd time when making assumptions
I've been working on my own bikes all my life but strangely never had a set of forks apart.
Cheers _________________ '99 DB4 #104, '96 SB6 #1165, '94 DB2 J #652, '99 DB4 #088, '08 VTX1800, '93 ZXR750R M1, '95 ZXR750, '95 ZXR750 Race Bike, '94 CBR400rr NC29 Race Bike, '94 CB250, '49 BSA C10 250, '61 BSA A10 650, '89 ZXR750, '91 Ducati 851 |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Mon Jul 06, 2015 1:54 pm Post subject: |
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You measure the air gap with the spring and spacer out, then assemble them I think.
Surprised that a CB250 has cartridges though _________________ Don't read everything you believe |
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Bud977
Joined: 03 Mar 2013 Posts: 525 Location: Sydney
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Posted: Tue Jul 07, 2015 12:19 am Post subject: |
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The CB250, being a budget bike, would only have damper rods forks, no cartridges.
After you have changed the seals and put the forks back together without the cap and spring, fill with roughly the right amount of oil, then pump them up and down to get the air out.
Then measure the oil level with the fork collapsed and the spring out. It should be about 150mm from the top. You would find the exact height in the manual or somewhere on the interweb.
Then it will be track ready. |
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brian
Joined: 22 Aug 2011 Posts: 3769 Location: Australia
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Posted: Tue Jul 07, 2015 12:52 am Post subject: |
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Thanks fellas. Sorry I'm not up to speed on fork terminology... yes i would say damper rods not cartridges. I could only find a spec sheet on the old girl and not a manual. The spec sheet only had the amount of oil (152cc) and not a height. I've put them together with that amount of oil so I'll just see how it rides. It's only a work hack so should be ok unless I have to outrun the coppers
Thanks again _________________ '99 DB4 #104, '96 SB6 #1165, '94 DB2 J #652, '99 DB4 #088, '08 VTX1800, '93 ZXR750R M1, '95 ZXR750, '95 ZXR750 Race Bike, '94 CBR400rr NC29 Race Bike, '94 CB250, '49 BSA C10 250, '61 BSA A10 650, '89 ZXR750, '91 Ducati 851 |
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