badassbanshee479 Posted April 26, 2006 Report Posted April 26, 2006 working on a suzuki king quad, thing would not start so I check spark all good, checked for fuel good to go, then did a compression check and the gauge will jump to about 40 psi then it will fall right back to zero every compression stroke, so I pull the head off and all the valves look good, have not taken them out of the head yet but they look good, spun the motor over and cant find any major scratchs in the cylinder wall. anyone have any ideas?? oh and when I pulled the air box lid off it was about half full of gas never seen that before. Quote
BenBB Posted April 26, 2006 Report Posted April 26, 2006 I hate working on four strokes...wierd on the compression readings though, have you pulled off the cylinder to see if there's any rings on the piston? Quote
badassbanshee479 Posted April 26, 2006 Author Report Posted April 26, 2006 kind of got droped in my lap one sunday morning, would rather it be a two stroke but ya got to take what ya can get I guess, nope it got to late last night so I am gonna pull the cylider after work today. Quote
als660r Posted April 26, 2006 Report Posted April 26, 2006 , then did a compression check and the gauge will jump to about 40 psi then it will fall right back to zero every compression stroke, before. 508041[/snapback] Check your tester sounds like you have a bad check vavle . tester should not drop that fast Quote
steveodo Posted April 27, 2006 Report Posted April 27, 2006 hey jt sounds like the compression tester wasnt screwed all the way down. Did that to me the first time I tried it on the 400 > If not give me a call Quote
badassbanshee479 Posted April 27, 2006 Author Report Posted April 27, 2006 I thought that too but I took it out put a little oil on the seals and screwed it back in and it did the same thing. Quote
steveodo Posted April 27, 2006 Report Posted April 27, 2006 was it a long thread or a short thread one? i had to use the long thred adapter an a short extension to get it to work on my 400 . but it works perfect on the banshee Quote
rsheppick Posted April 27, 2006 Report Posted April 27, 2006 (edited) That compression reading is fine. This motor is deisgned with a Starter Torque Limiter. ( The cam has an Automatic Decompression Assembly) This cannot be removed. FYI the Compression is or should be around 142PSI= Sea Level The recommended way to test the Compression for this motor is basicly the same as the shee. Install the comp gauge. Keep the throtthe fully open. Press the starter button and crank the motor for a few seconds. Approx 1000 kPA ( 10.0 kfg/cm2)... I own a bran spanking new kingquad with about 440 miles on it i love it can you tell me once the key is turned on is the FI light on, off or blinking? What are the symptoms of the bike, what happened prior to this issue. Also, was a Dynojet Commander installed at any time? Also this might be stupid. can you tell me if the display says "check" on it ? Edited April 27, 2006 by rsheppick Quote
rsheppick Posted April 27, 2006 Report Posted April 27, 2006 (edited) I feel your problem is related to one or all of the above. the TP Sensor is possibly out of adjustment. Fuel Pump is defective... TP Sensor is defective the CKP Sensor is defective the IAP Sensor is defective Defective ECM Defective ECT Sensor or Defective IAT Sensor.... Did you also clean the fuel filter? I feel your issue is related to the FI... If you want to further troubleshoot this motor you need to obtain part # 09930-82720 from a dealer. This will be the only real way for the ECM to tell you what is really wrong. Edited April 27, 2006 by rsheppick Quote
badassbanshee479 Posted April 27, 2006 Author Report Posted April 27, 2006 this is an older bike with a carb on it, guy droped it off and said he was pulling a roller around his yard last fall and after he put it away he pulled it out in the spring and it would not start. and there is a manual compression release on the head, valves all looked good, I fliped the compression release and it is opening the valve like it should, can still see cross hatches in the cylinder wall but I have not had a chance to pull the cylinder off and check the rings yet. steve this bike has a real weird size spark plug so I had to use one of the adapters and the normal hose that was on the gauge. I thought it was the gauge at first also but like I said I tryed it twice just to make sure. one guy seems to think the floats stuck and filled the motor full of fuel, causeing the oil to be washed off the cylinder walls and trashing the rings. only thing we can think of to cause the air box to be half full of gas. Quote
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