RE: Light smoke, running rough...

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CBR Forum >> Past CBR Models >> CBR 1000F "Hurricane" >> RE: Light smoke, running rough...

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RE: Light smoke, running rough... - 7/8/2008 11:00:13 AM

GILL

Posts: 455
Joined: 1/15/2008
From: Halifax, Nova Scotia Canada
Status: offline

Or maybe valve seals or guides. Usually if the bike sits the oil seems down past the valve seal and into the combustion chamber and accumulates until you go to start it, then it burns the oil out. Like IODIRT said, do a compression check and you''ll see the needle fluctuate if its the valves. If its the rings, you''ll get smoke from acceleration, valves smoke on decelleration.

(in reply to 1000fwilson)

Post #: 16

RE: Light smoke, running rough... - 7/8/2008 5:10:16 PM

1000fwilson

Posts: 38
Joined: 5/22/2008
From: Memphis, TN
Status: offline

Ok, as of now I am trying to find a proper sized compression tester (for the 12 size spark plug) I have to order it from online, there is nothing but 16 and 14 here locally. So, I cannot do a test yet. However, I did talk to a older mechanic today and hs said it was the head gasket, given the time it takes for the coolent to reach the chamber would explain the time line of the two minutes then smoke. I am still going to wait until I do a compression test. Anyone know of a great place to get a head gasket in the States? and how difficult would this be?

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Post #: 17

RE: Light smoke, running rough... - 7/8/2008 7:56:50 PM

Shadow

Posts: 3420
Joined: 12/21/2007
From: Pinetown, South Africa
Status: offline

Try www.mrcycles.com for the gasket.

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Post #: 18

RE: Light smoke, running rough... - 7/8/2008 9:03:17 PM

tallenuf

Posts: 224
Joined: 7/2/2008
From: San Jose, CA.
Status: offline

Mr. Cycle is a very good parts source. www.bikebandit.com is another. I usually compare the prices at these two online shops for OEM stuff then ask the local stealership and pick the best deal for what I need.

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Post #: 19

RE: Light smoke, running rough... - 7/9/2008 5:49:40 PM

1000fwilson

Posts: 38
Joined: 5/22/2008
From: Memphis, TN
Status: offline

Update, did acopression check today with a loaned guage fro a local shop! Good news, all were around 55-60 psi. No leaks! So I guess this comferms the head gasket. Now I am just shopping for a great price. I think I''d better get a valve cover gasket also. Any one think I should replace other things while I am at it? Only 11,000 miles on the 1990 bike.

Thank you!

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Post #: 20

RE: Light smoke, running rough... - 7/9/2008 6:00:21 PM

1000fwilson

Posts: 38
Joined: 5/22/2008
From: Memphis, TN
Status: offline

UHH I think I just read that I will have to replace the cam chain. Is this right?

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Post #: 21

RE: Light smoke, running rough... - 7/9/2008 10:50:53 PM

Shadow

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Joined: 12/21/2007
From: Pinetown, South Africa
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If you''re having to replace the headgasket, doing the camchain and CCT would make sense.

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Post #: 22

RE: Light smoke, running rough... - 7/10/2008 10:54:32 AM

1000fwilson

Posts: 38
Joined: 5/22/2008
From: Memphis, TN
Status: offline

After looking at the manual and the parts diagram on Bikebandit it looks like I better replace the upper gasket and the lower gasket along with the cover gasket. Is that what you see or have experienced?

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Post #: 23

RE: Light smoke, running rough... - 7/10/2008 11:00:49 AM

Shadow

Posts: 3420
Joined: 12/21/2007
From: Pinetown, South Africa
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Probably the best bet........I''m assuming the head isn''t warped..?

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Post #: 24

RE: Light smoke, running rough... - 7/10/2008 11:05:33 AM

tallenuf

Posts: 224
Joined: 7/2/2008
From: San Jose, CA.
Status: offline

Always best to check the head and cylinder sealing surfaces for warpage when replacing a head gasket, especially if your replacing the gasket due to a sealing failure. A warped head or cyclinder may be why the gasket failed in the first place.

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Post #: 25

RE: Light smoke, running rough... - 7/11/2008 7:39:25 AM

Steve_Cardiff

Posts: 98
Joined: 7/2/2006
From: Cardiff, South Wales.
Status: offline

Tried to reply yesterday but couldn''t - i''ll try again.

Before you go stripping the engine to change a head gasket, i''d be inclined to strap the petrol tank off your other bike onto it to see how it runs then.

Changed the petrol tap and had the tank recoated? That makes me a little suspicious.

A blown head gasket on an 11,000 mile engine is real unlucky (although not entirely unheard of)

When did she last have a good run? The smoke you describe could just be condensation in the exhaust boiling off.

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Post #: 26

RE: Light smoke, running rough... - 7/11/2008 7:45:58 AM

Steve_Cardiff

Posts: 98
Joined: 7/2/2006
From: Cardiff, South Wales.
Status: offline

Blown head gasket with all compression good? Nope - unless the gasket has blown between the oilways and the waterways. Look for contaminated oil or water.

Valve guides worn? Again, 11,000 miles?? With worn valve guides you get blue smoke on start up (not after a few minutes) that burns off in a matter of a few seconds.

I''ll bet you a half eaten orio that it''s something to do with the tank and/or petrol tap.

And i''ll bet a whole one that the head gasket is fine

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Post #: 27

RE: Light smoke, running rough... - 7/16/2008 12:51:18 PM

1000fwilson

Posts: 38
Joined: 5/22/2008
From: Memphis, TN
Status: offline

Okay, I have no fluid leaks at all. Nothing to suggest a warped head from the exterior. The last good run was almost 25-30 miles. Running great but a slight cough at times. I hit about 130MPH and I seen a cop so I backed off and at the same time I lost all fuel flow into the bowls on the carbs. Pulled over and sat for about 3-4 minutes for them to fill up again and she started up fine. 7-8 miles later and almost home she started to bogg down and loosing power. Stopped and could not get started at all. Trailered it to a friend’s house and cleaned the carbs, and filters in the carbs and charged the battery (I ran it down trying to start). About two days later I started her up and no smoke until she
was warmed up. Drove almost a mile to my house and was smoking the whole way.
She does not smoke until about two minutes of running. Shut her off and start up again and no smoke until two minutes later. Smoke does not burn the eyes, and is not sweet smelling - coolant. Although, I am running Valvaline Auto Oil....something with that maybe? I did check the oil today with a syringe and no water, separation or cloudy stuff at all, just oil. Looked into the coolant reservoir and it is fine, no oil.

Ran a second compression check today topping the piston out four times each and all went great, 145,145, 145, and 150.

Thanks for the help guys
Russ

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Post #: 28

RE: Light smoke, running rough... - 7/16/2008 12:52:42 PM

1000fwilson

Posts: 38
Joined: 5/22/2008
From: Memphis, TN
Status: offline

Wow, Guy''s I am sorry that last one took soooo looonggg to reply to. I took out a few words: L.I.K.E x3, and a W.h.i.l.e and it worked!!!

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Post #: 29

RE: Light smoke, running rough... - 7/16/2008 12:58:22 PM

1000fwilson

Posts: 38
Joined: 5/22/2008
From: Memphis, TN
Status: offline

I was also told from a local honda mechanic that this is a ring problem on one of the pistons. Never the less I just bought all my gaskets and a new set of rings from Hondaparts-direct.com in Texas. The best prices around the US that I have found.

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Post #: 30