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Need help with compression problem...
- FreeKZ650
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I'm the 3rd owner. The guy that I got the bike from said that it had a couple of problems. He believes that something is wrong with the starter. It spins just fine but it seems to not engage. He said that he started it one day and it fired right up with the first kick. Problem was it seemed to have a compression problem to him. He stored it hoping to rebuild the bike one day but he is now 50 and has lost total interest. Now it is in my hands....
Bike is in excellent shape..... this is my first street bike but I own a couple of dirt bikes that I have been riding for years.
I pulled all 4 plugs to do a cold compression test....I know, not the best but here's what I have found. For some reason I cant get a reading on any of the cylinders. I know the compression tester is good due to I tried it on one of my dirt bikes. Also, should this bike be real easy to kick over? Im used to the compression of a 2-stroke 250. I dont know if Im missing something on the test.....
All 4 plugs looked to be burning real clean upon removal..... no oil deposits or anything. Any help or suggestions would be greatly appreciated.
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- JMKZHI
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- OKC_Kent
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So plug your finger over a hole and kick, is it trying to push your finger off?
Oklahoma City, OK
78 KZ650 B2 82,000+ miles
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- RetroRiceRocketRider
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- ...bring in the machine that goes PING!
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Not a KZ650 cheap, but FREE? (are you seeing this BadKaw?...lol!)
Lucky you!
If you're pulling the clutch lever in while trying to kick the bike over, that might be where your prob is.
If you look on the back of the clutch lever perch you'll see a plug with two wires running from it, this is the clutch "safety switch". It prevents the bike from starting if it's in gear when you push the starter button.
If you hold the clutch lever in while trying to kick start the bike however, (IIRC) it disengauges the inner kick start mechanism from it's associated gearing and won't turn the engine over = no compression reading since the crankshaft isn't turning and moving the pistons in the cylinders.
And as JMKZHI stated, compression readings should be done with the throttle held wide open to get the best results.
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- steell
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He is used to primary drive kickstarters found on dirtbikes, those you can kickstart while holding the clutch in.
Sounds like 4R wins this one
To answer the next (unasked) question, the bike must be moving (not just the motor running)to shift into anything other than 1st or neutral
KD9JUR
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- FreeKZ650
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So..... 130,130,128,70 next question..
I now know there is a need for a top end rebuild. Where is the best place to purchase a top end kit for this bike?
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- Patton
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...compression...130,130,128,70...need for a top end rebuild....
Maybe not - would first check valve clearances, especially the low cylinder.
1973 Z1
KZ900 LTD
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- 650ed
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Post edited by: 650ed, at: 2007/09/21 18:07
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- FreeKZ650
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- Bluemeanie
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Post edited by: Bluemeanie, at: 2007/09/21 18:28
1980 KZ650F1, Bought new out the door for $2,162.98!
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- FreeKZ650
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- Skyman
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- 1978 KZ1000-B2 LTD 1982 KZ1000-M2 CSR
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Post edited by: Skyman, at: 2007/09/21 18:36
West Linn, OR
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