Today I checked my valves clearance (picture below) Should I do something about it? clerance will probably get smaller over time or have I misunderstood something ??
I had them increase with time on the only bike I ran for long enough to need several adjustments in its life with me, but you're free to make your observations on your bike.
As they stand now, you may need one of them elusive 253 type shims (which were only used at the factory) to get them right without being too tight. Run it, if it increases, you're good to swap to the next thicker shim. If it decreases, well you run it till it goes out of spec.
Cool.
Buddha.
Okay cool.. so you do not think my specs are too loose for now?
and how many km do you think I can drive before I have to check again :)
Quote from: lenwe on May 08, 2022, 03:50:35 PM
Okay cool.. so you do not think my specs are too loose for now?
and how many km do you think I can drive before I have to check again :)
You are loose, but next shim up will be too tight for "forum consensus". The general thought is you run .05-.07 intake and .07-09 exhaust instead of .03-05 suzuki recomends.
http://gstwins.com/gsboard/index.php?topic=62370.0 - GSJack outlines his numbers, but I've seen people arrive on larger than his exhaust for intake and even a step higher for exhaust.
FWIW, yamaha maxim's from the 80's had the same type of motor and even used shims you can put in a GS in a total emergency - in short, the same thing as a GS1000-550 series - just yamahaized which is basically 2X the GS500 motor. The suggest .005-007 intake and .007-.009 exhaust.
A thicker shim swap means you lose .05. So subtract .05 from yours and you get 2 at .05 and 2 and .03 - sadly the wrong ones are .03 (or atleast 1 is) If you wanna really get technical, I'll do the 2 that are .1 and leave the other 2 alone. Or maybe do the intake that's .08 also but dont touch the .08 exhaust. General suggestion was to run exhaust over .05 whether it be GSJack or many others here and I wont disagree.
BTW I had an oil using motor I flogged for 50K miles and I could if I wanted to check the valves every weekend. Which I did. And found, mine wore loose. So if you see that happening, swap all 4 with 1 step thicker in a 1000 miles or what miles you check next.
On a side note, You should hear each valve and determine how it sounds, and see if it changes. Also part of getting to know the bike.
PS: Sorry .07 for 1 exhaust not .08 - dont touch that, the .1 - meeh, its OK. I'd really not touch any, but you can swap the intakes 1 size up if you prefer.
Cool.
Buddha.
Okay so you do not think it will hurt to drive 2000km more and then check again ? :)
Yea 2000 miles is about perfect, see if it increases, then you can do 1 thicker all around. And you also see the pattern of wear for your bike. Also learn to hear it and know what's happening by tying it to that data point.
Cool.
Buddha.
Looks perfect to me. The only one that might concern me would be the .10 on your right intake but its close enough.
For the exhaust I run mine anywhere from .05 - .15 on the exhaust but I aim for .08
For intake I aim for the Suzuki spec .03 - .08 but would accept .09 or .10 if that's what worked out with the shims I had on hand.
As The Buddha says, run it for awhile (like 2,000 to 4,000 miles) and then check again so you know the direction and speed of change on your bike's valve clearances. Once you know that you can generally go 8,000 miles between valve checks and you can predict which shims you will need to order ahead of time.
+1