Thread: Help with piston wash.
05-24-2008, 11:06 PM #1
Help with piston wash.
Here are some pics of my piston wash.
I installed a tripple fuel pump last year (Has about 5 hours of run time on it. Carbs were cleaned, at the same time. looks like the mag cylinder is running lean, the others look ok. Let me know what you guys think. BTW lst year when I road it hard and came to a stop and the took back off right away it would sometime stumble for a second, I have been told to turn the low speed screws out a 1/4 turn, but I wanted to get a look at the pistons first, let me know what you guys think about the wash.
95 SL750 Fuji stock no mods, except tripple pump, new fuel lines, and cleaned fuel valve.
Thanks Tim Atkinson
05-25-2008, 12:18 AM #2
Clearer picture on 1 please.
I'd go 1/8 open on 2nd picture.
I'd go 1/4 turn open on last picture.
and see how I looked after that.
05-25-2008, 12:59 AM #3
05-25-2008, 09:39 AM #4
- Join Date
- Oct 2006
- Cleveland OH
MAG looks lean.
If it's completely stock, the settings in the book should work great.
Maybe do a leak down test to see if you're sucking air from a gasket or crank seal.
05-25-2008, 09:51 AM #5
- Join Date
- Aug 2006
Mag looks minutes away from freeholie
05-25-2008, 07:51 PM #6
- Join Date
- Apr 2007
- JUST NORTH OF CUBA-- FL,KEYS
05-25-2008, 08:09 PM #7
check your crank index...usually in my skii, when the mag heat up too much, even giving it with enuf oil...the crank is out of index...when now i find out when i already disassemble and check for alignment
05-25-2008, 08:46 PM #8
When we tore it apart last night it looked ok, It did not have an damage to the piston, it just looked like it has been running lean. The cylinder walls looked ok, and the compression is good, I am going to do a smoke test and check the engine gaskets/seal for leaks. The carbs all looked great, do you guys think this could have been from before I put the tripple pump on and I am chasing a problem that doesn't exist now. I am going to check the crank index tuesday, Can I remove the domes and check the distance from the piston TDC with a dial indicator, that should tell me if the crank is out right?
Thanks for all of you help
BTW how long does it take for piston wash to show from a jet change?
05-25-2008, 08:57 PM #9
better check for air leaks then check crank index...mag is tooo lean....
05-25-2008, 09:00 PM #10
I agreed I think I was seconds from disaster, am I on the right track about the crank index?
Also should I replace the piston or can I put it back in service if it all checks out ok?
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