rjdgriff Posted October 16, 2011 Report Share Posted October 16, 2011 So just put a new serval in and it's only running on 1 cylinder. I have spark and fuel. Compression is good. Stock carbs t5 exaust v3 reeds noss cool head adjustable time plate (+4). Any ideas? Quote Link to comment Share on other sites More sharing options...
coryv4 Posted October 17, 2011 Report Share Posted October 17, 2011 So just put a new serval in and it's only running on 1 cylinder. I have spark and fuel. Compression is good. Stock carbs t5 exaust v3 reeds noss cool head adjustable time plate (+4). Any ideas? choke tube in place? to low of idle? to small pilot pilot airscrew to far out try another set of spark plugs ive had plugs not work from the store dont no why but it happens Quote Link to comment Share on other sites More sharing options...
coryv4 Posted October 17, 2011 Report Share Posted October 17, 2011 choke tube in place? to low of idle? to small pilot pilot airscrew to far out try another set of spark plugs ive had plugs not work from the store dont no why but it happens also put that timing plate at +3 servals dont like alot of timing are your reeds crack? Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted October 17, 2011 Report Share Posted October 17, 2011 If all the basic stuff checks out (choke tube, fuel supply, spark, compression check, etc) then start swapping parts side to side 1 at a time and see if the problem jumps to the other cylinder. Did you do a leak-down test? Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted October 17, 2011 Author Report Share Posted October 17, 2011 Ok so I swapped plug wires no change the carbs should be fine I have 27.5 pilots I think. I I have tors removed but there is still a black box for it and when I plugged it in, it seemed that it was running on both cylinders but then it wouldn't idle anymore. As far as timing goes will going from +4 to +3 make a difference on one cylinder firing? Idk lol. Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted October 17, 2011 Author Report Share Posted October 17, 2011 Also the reeds are brand new Quote Link to comment Share on other sites More sharing options...
ban99shee Posted October 17, 2011 Report Share Posted October 17, 2011 I would try a pressure test, and test the cylinder compression. Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted October 17, 2011 Author Report Share Posted October 17, 2011 Compression is perfect Quote Link to comment Share on other sites More sharing options...
DannysZ28 Posted October 17, 2011 Report Share Posted October 17, 2011 Make sure carbs are in sync. I put mine back together one time in a hurry and had my carb cable binded and it made one carb open more than the other in which made one cylinder dead. Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted October 17, 2011 Report Share Posted October 17, 2011 Piston in backwards? Washer not on mainjet in carb? Forget to put mainjet in carb? Fuel line kinked or clogged? Fuel runs out of line and carbs fine? Float level messed up, no fuelcomin thru carb? Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted October 17, 2011 Author Report Share Posted October 17, 2011 Carbs are in sync. Main jets are there washers are there. Fuel lines are good, good gas flow into carbs. something in carb not working right???? I'm not a carb wiz, but the slides are synced and moving like they should all jets are in place. Quote Link to comment Share on other sites More sharing options...
firebanshee Posted October 18, 2011 Report Share Posted October 18, 2011 You might have your slides in your carbs swapped, switch the slides and try it. Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted October 18, 2011 Report Share Posted October 18, 2011 wow.....where you been firebanshee? haha long time since i've seen you here.... id agree with fire.....check your carb slides (cut out shape facing the rear of the bike is correct) and are you SURE that your pistons made it in correctly? which way did you point the little arrow on the piston tops? Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted October 18, 2011 Report Share Posted October 18, 2011 was the cylinder setup the only change, or did you do other things at the same time, like remove tors, add cdi, change wiring, etc. what do the plugs look like ? Quote Link to comment Share on other sites More sharing options...
SlowMoe Posted October 18, 2011 Report Share Posted October 18, 2011 Abackwards piston or lack of a flywheel key would be my guesses Quote Link to comment Share on other sites More sharing options...
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