The Kat's not well

**Kickaha** · 14th May 2006, 20:50

Originally Posted by Bonez

Doesn't look like the plug has been firing. Try a new/replacement one. .

He's already been told to do that

Originally Posted by paturoa

Redo your comp test with a teaspoon of oil into each the plug hole. If the compression goes up then rings if stays roughtly the same then valves.

I told him to that earlier today after he did the initial compression test

Originally Posted by paturoa

Have you run your finger nail on the cam lobe?

Did that yesterday when he was checking the clearances, the lobe is a different colour but it isn't marked or worn

Originally Posted by paturoa

A good site for help is http://www.thegsresources.com/ Search the forum posts. Lots of good stuff about carbs etc.

Gave him that to, if he spent as much time on his bike as he does attention seeking on here it'd already be fixed

Originally Posted by dangerous

as I said to W I will do the old oil down the plug hole when I get the chance

you've already had a chance to do it well before you posted this

**Bonez** · 14th May 2006, 21:05

Originally Posted by Kickaha

Gave him that to, if he spent as much time on his bike as he does attention seeking on here it'd already be fixed

Yipsireeebob

**Buddha#81:Me** · 14th May 2006, 21:09

I had a GSX1100 years ago and it had a cracked head with low comp on 1 cyl. I couldn't afford to fix it so bunged it back togeather and rode it hard for another 10k before selling it to a unsuspecting punter. Dont worry about the comp you are looking for a electrical or fuel fault. Good old trademe strikes again, yellow paint anybody. Go the cb250, the Kat will look good in the pits

.

**k14** · 14th May 2006, 21:21

Originally Posted by TonyB

Erm, rounded to the nearest 5 psi should be
165
150
160
170

Yeah well obviously his maths is as bad as his english. Too much distraction at school i reckon, being an all boys school an all that is

**T.W.R** · 14th May 2006, 21:45

I'd be working from the plugs back firstly, guaranteed with the age of the Kat if the plug caps aren't getting worn, then the leads will be stiff & most likely breaking down internally which would be causing the misfire.
If its a coil it may also effect #4 cyl as well but it doesn't look like it is.

Also the Plugs are one grade colder than should be in there (D8EA)

The compression issue could be a result of the misfire anyhow with carbon build-up on the exhaust valve seat, so a lap & re set could be useful too.

**Finn** · 14th May 2006, 21:53

I'm mistified as to why you didn't pm me first. After all, I am the expert.

It's your tire pressure.

**iwilde** · 14th May 2006, 22:04

Originally Posted by spud racer

I had a GSX1100 years ago and it had a cracked head with low comp on 1 cyl. I couldn't afford to fix it so bunged it back togeather and rode it hard for another 10k before selling it to a unsuspecting punter. Dont worry about the comp you are looking for a electrical or fuel fault. Good old trademe strikes again, yellow paint anybody. Go the cb250, the Kat will look good in the pits

.

What a cunt, arseholes like you always get what you deserve in the end!

**miSTa** · 14th May 2006, 22:04

Very high probability that the diaphram in the fuel tap is rooted. I had exactly the same thing on my GSX1100. What happens is that when the diaphragm is rooted is that the fuel overlows carb 2 (Fuel overflows carb 2 by getting drawn through the vacuum line [vacuum line to feul tap originates from carb 2]), resulting in a plug that is black and sooty. I tried a rebuild kit from Colemans without success (with a try first $25 IIRC) then scored a new tap from Don at Cycle treads ($180 I think). There is a test for it but I cannot remember what it is - check www.thegsresources.com

Edit - Disconnect the vacuum line, plug carb and feul tap, switch to "prime" and ride (switch to run or reserve at end of ride so as not overflow carbs). Plug colour should return to normal. If it does its the diaphram thats rooted.

**_Gina_** · 14th May 2006, 22:13

Originally Posted by Finn

It's your tire pressure.

Nice American English...

Eats Shoots and Leaves anybody?

**Finn** · 14th May 2006, 22:20

Originally Posted by girlygirl

Eats Shoots and Leaves anybody?

I knew we've met before.

**scumdog** · 14th May 2006, 22:27

Hmm, if it was an H-D I would say swap leads over and see if the other plug fouls BUT seeing as you're hell-bent on messing with multi cylinder Devils toys I would swap the plug with another cylinder and see if the same cylinder fouls - then at least you would know if it was the plug or not.

Get somebody with one of those magic 'lectric gizmos to check coil for output and lead for breakdown.
ARE all exhaust valves opening the same amount?
And don't forget ZZRs advice.