Smokin'

Dickiebig · Post by **Dickiebig** » Sun Aug 21, 2016 9:42 am

Hi guy's,
Really need a bit of advice here. Just back from an aborted run.

Stopped as the bike was running rough. Pulled in to a layby and lots of what appeared to be smoke coming out both exhausts.

Oil and water appear ok bike not running hot on temp gauge. It does seem to run reasonably at speed as I got it home but it runs rough at low speed and will not idle.

Any suggestions as to where to start. I'm thinking rings or valve guides.

History on the bike. I acquired it after a long period of idleness and have been gently using it but as I get braver have been winding it up a bit so suspect it didn't like that.

Oil, filter, plugs rad flushed and mccts changed by me when I got it.

Regards Richard.

Wicky · Post by **Wicky** » Sun Aug 21, 2016 9:46 am

Try a compression test

http://www.vtr1000.org/phpBB3/viewtopic ... 31&t=18025

Dickiebig · Post by **Dickiebig** » Sun Aug 21, 2016 10:23 am

Cheers, Will do anybody have a kit that they would be willing to let me borrow. D

VTR Phoenix · Post by **VTR Phoenix** » Sun Aug 21, 2016 3:14 pm

What colour is the smoke? You sure you didn't overfill oil? Could be valve stuck open, timing could be off. If its running crap and smoking I would say your plugs are probably coated in oil and its getting into the combustion chamber past piston rings being worn or valve seats need relapping/excess carbon build up or the timings off leaving the valve open.

If you have no oil in your coolant or coolant in your oil then shouldn't be anything major unless your hearing a lot of noise from the engine.

Dickiebig · Post by **Dickiebig** » Sun Aug 21, 2016 3:41 pm

Hi all bit of an update.

Bike in garage, with a full tank of juice so thought I would get that out, lucky I have a syphon. So get most of it out and think I will try to start the bike.

It turns over, no nasty noises but refuses to start. It does smoke a lot bluey hazzy but also grey a well.

Oil level were it should be. Coolant on the lower level and rad full when opened. No oil seen in water or the other way round.

Not pulled plugs yet so will do that and report back.

Up till today it has run well and I let it warm up first before giving it any real juice.

Cheers Dude.

VTR Phoenix · Post by **VTR Phoenix** » Sun Aug 21, 2016 3:52 pm

Blue or grey is oil burning. Rings/Valve Stem Seals/Valve seats

Dickiebig · Post by **Dickiebig** » Sun Aug 21, 2016 4:05 pm

So if burning oil what would you guy's consider to be the best action to take, heads off first and go from there?

Would you still recommend a compression test as a base to start from. As I said the bike does not want to start now so would not be able to get up to temp.

VTR Phoenix · Post by **VTR Phoenix** » Sun Aug 21, 2016 4:16 pm

Compression test will tell you what cylinder has the issue but wont diagnose what the issue is but will narrow it down to the cylinder. I always test compression cold.
A leak down test will tell you more specifically what the issue is.

Although a compression test, once you find which the problem cylinder is, take the valve cover off and turn the engine over with the tester still screwed in. If you have air coming from valve spring area then your valves aren't seating correctly, no air coming from there and its piston rings. If your not losing air at all then its valve stem seals

macdee · Post by **macdee** » Sun Aug 21, 2016 4:17 pm

Richard wrote:So if burning oil what would you guy's consider to be the best action to take, heads off first and go from there?

Would you still recommend a compression test as a base to start from. As I said the bike does not want to start now so would not be able to get up to temp.

read plugs first and do a compression test try to find out if its in one or the other cylinder

Dickiebig · Post by **Dickiebig** » Sun Aug 21, 2016 4:45 pm

OMG much easier to take a Birmingham screwdriver to it, but that won't solve the problem only make me feel better.

macdee · Post by **macdee** » Sun Aug 21, 2016 5:01 pm

Richard wrote:OMG much easier to take a Birmingham screwdriver to it, but that won't solve the problem only make me feel better.

plugs plugs pull the plugs

Dickiebig · Post by **Dickiebig** » Sun Aug 21, 2016 5:13 pm

Right both plugs out. Both black wet and oily with the rear appearing wetter.

Pulled pulled and pulled, oh bugger only two where did the third pull come from.

VTR Phoenix · Post by **VTR Phoenix** » Sun Aug 21, 2016 5:39 pm

Now conduct the compression test, crank the engine 5 or 6 times and note the pressure on the gauge. Don't do anything for 30 seconds and keep an eye on the gauge. If the pressure drops significantly then there is a leak either rings/head gasket or valves. No leak and its oil stem seals. Same test for both cylinders

Dickiebig · Post by **Dickiebig** » Sun Aug 21, 2016 5:44 pm

Cheers guy's feeling much happier now I have some direction. Could I beg borrow steel a tester from anyone. Happy to collect if not too far.
This is not my main transport but my toy.

Cheers D.

VTR Phoenix · Post by **VTR Phoenix** » Sun Aug 21, 2016 5:51 pm

Why are you?

VTR1000.ORG

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