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White smoke from exhaust when changing gear at high revs?!?

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CBRMAN94
Nitrous Nuisance



Joined: 10 Jun 2013
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PostPosted: 23:14 - 22 May 2015    Post subject: White smoke from exhaust when changing gear at high revs?!? Reply with quote

This bike is truly testing me now! FZR400rr

Went for a ride tonight with a friend who told me that when i'm on full throttle and change gear i get a 'plume' of white smoke every time. Never noticed this before and can't get it to repeat in idle. Warmed up fully too. Not sure if this is much to worry about or not.

Gonna get a sniff test on it on Tuesday at work to check for head gasket?

Any ideas other than burning it?
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Honda CBR-RW6 (Sold) - Kawasaki GPZ500s (Sold) - Honda CG125 (Project) - Honda CB750 Cafe racer (Project) - Yamaha FZR400RR
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Taught2BCauti...
World Chat Champion



Joined: 12 Jan 2012
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PostPosted: 08:32 - 23 May 2015    Post subject: Reply with quote

Either we have a new pope, or your head gasket is on the way out.

Are you losing water? (check it when it's cold!)
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Honda Varadero XL125(V8)
www.TheFutureIsHere.eu
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Andy_Pagin
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Joined: 08 Nov 2010
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PostPosted: 09:19 - 23 May 2015    Post subject: Reply with quote

Possibly oil burning off if you've over-filled it, or knackered piston rings?
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They're coming to take me away, ho-ho, hee-hee, ha-haaa, hey-hey,
the men in white coats are coming to take me away.
Yamaha Vity -> YBR125 -> FZS600 Fazer -> FZ1-S Fazer
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CBRMAN94
Nitrous Nuisance



Joined: 10 Jun 2013
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PostPosted: 09:20 - 23 May 2015    Post subject: Reply with quote

I have had a new lease of faith....

Haven't had a chance to check levels yet, came in late last night. Will check today
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Honda CBR-RW6 (Sold) - Kawasaki GPZ500s (Sold) - Honda CG125 (Project) - Honda CB750 Cafe racer (Project) - Yamaha FZR400RR
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CBRMAN94
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PostPosted: 19:01 - 26 May 2015    Post subject: Reply with quote

Oil and water spot on... Any ideas?
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Honda CBR-RW6 (Sold) - Kawasaki GPZ500s (Sold) - Honda CG125 (Project) - Honda CB750 Cafe racer (Project) - Yamaha FZR400RR
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Andy_Pagin
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PostPosted: 20:28 - 26 May 2015    Post subject: Reply with quote

CBRMAN94 wrote:
Oil and water spot on... Any ideas?
If they're mixed together then it's almost certainly a blown head gasket.
____________________
They're coming to take me away, ho-ho, hee-hee, ha-haaa, hey-hey,
the men in white coats are coming to take me away.
Yamaha Vity -> YBR125 -> FZS600 Fazer -> FZ1-S Fazer
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Copycat73
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Joined: 11 Jan 2013
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PostPosted: 21:12 - 26 May 2015    Post subject: Reply with quote

Andy_Pagin wrote:
knackered piston rings?


not so much knackered as worn along with cylinder bores... a compression test may be of use ....
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