May 20th, 2021, 12:48 AM | #1 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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like that?
hey! 02 250R 21K (11K mine since october) got to be harder and harder to start over the last week then just didnt at all. my shop did a compression test idk what the other cylinders read but one had 25psi and the exhaust valve was stuck closed. after they adjusted the valve it read 40psi. i have read in several forums that i need at least 125psi from each cylinder to start? is this enough info to get some opinions, please? imma total newbie and the joy of riding has saved my life. can i save my bike back or is he a goner? thanks for your time!
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May 20th, 2021, 05:25 AM | #2 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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There's something wrong with the statement "the exhaust valve was stuck closed". If that were true you'd have one or more broken parts. Did the mechanic say this?
Sorry you're having trouble Lora, but welcome to the board! |
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May 20th, 2021, 09:12 AM | #3 |
ninjette.org member
Name: Dave
Location: Lisle
Join Date: Apr 2012 Motorcycle(s): 2003 Goldwing GL1800, 2002 Ninja 250, 2001 VFR800, 1999 Ducati 996 Posts: 107
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Somethings off here. A valve stuck closed would not increase compression if it were adjusted. A valve stuck open would. And like Jim stated, a valve stuck closed indicates other problems.
The bike has been running, just getting harder to start gradually. That doesn't match only 25psi or 40psi on a cylinder. So, what is the shops verdict? Does it start and run? Maybe they meant the vales were tight and that was causing compression loss, which would make things harder to start. Maybe they meant 125 psi instead of 25 psi? |
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May 25th, 2021, 03:55 AM | #4 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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the shop verified the readings again with me
the cylinder was at 25psi then after adjusting it went up to 40psi. no the bike does not start.
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May 25th, 2021, 03:58 AM | #5 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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oops
after adjusting the exhaust valve which they said was stuck shut. they said they couldn't even get a feeler guage in at first. they said they adjusted it to .04 and got the 40psi reading.
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May 25th, 2021, 04:06 AM | #6 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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the shop said i have a dead cylinder
and that my bike is toast. not worth repairing or rebuilding.
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May 25th, 2021, 05:35 AM | #7 | |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
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Quote:
It's possible that if it was run that way long enough the valve and the mating seat surface were eroded by the hot gas leaking, so the compression is now low even with the valve clearance adjusted properly. Fixing that would require removing the cylinder head and doing a "valve job", where the valve is reground and the seat repaired. Assuming my explanation is correct, the cost of that work may be as much as the cost of a good used replacement engine. |
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May 25th, 2021, 05:52 AM | #8 |
Rev Limiter
Name: Jay
Location: WI
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As TJ noted, most likely it has "burned a valve" and the head needs to be removed and the valve replaced.
Some additional work may be required, but it doesn't sound like the engine is junk to me - just needs a "valve job". Depending on a few things, a replacement engine may run in the range of $250 to $500. We sold a good one a while ago for $200 IIRC. It's not something you want to ship. |
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May 25th, 2021, 07:14 PM | #9 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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thank you!
that is what the shop told me today, too! to the letter! i am thinking four gear heads cannot all be wrong. thank you so much for taking time to help me! you guys ROCK!
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May 26th, 2021, 05:32 AM | #10 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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I hope you find a solution without too much trouble Lora. Keep us posted!
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May 26th, 2021, 10:21 AM | #11 |
ninjette.org certified postwhore
Name: Gordon
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@thrasherblue had you ever done a valve clearance check during your ownership? At 21K bike should have had 3 during its lifetime. I'll wager never done, and if so...at least not properly.
As exhaust valves tend to tighten (thus requiring compensating adjustment) the importance of the procedure becomes quite obvious.
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May 26th, 2021, 04:21 PM | #12 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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it's barely at 21K
hi! my speedo was down for a little while but i believe i kept pretty good track of my miles. if i have miscalculated, its no more than 100 miles over 21K
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May 26th, 2021, 04:25 PM | #13 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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i got the bike with 10,484 (what my shop calls rode hard and put away wet) miles. i have not done the valve checks unfortunately i was unaware until you told me.
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May 26th, 2021, 04:35 PM | #14 |
ninjette.org certified postwhore
Name: Gordon
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Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
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Checking/adjusting valve clearance a vital obligation, as you've now learned after suffering the consequences.
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June 3rd, 2021, 07:05 PM | #15 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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hi! i, very nicely and unaccusingly, asked my shop, "if we had known my bike was supposed to have had compression tests done at 6000 mile intervals, would we have done one?"
"no." "how come?" "because of the age of the bike." |
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June 3rd, 2021, 07:24 PM | #16 |
ninjette.org certified postwhore
Name: Gordon
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"compression tests done at 6000 mile intervals"
Huh? I'm guessing you really meant *valve clearance* checks?
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June 3rd, 2021, 08:47 PM | #17 | |
Guy Who Enjoys Riding
Name: Jim
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Quote:
Checking them involves taking off the valve covers and using feeler gauges to check the clearances between the valves and the cam lobes that are epening them. It's in the manual, and also here: https://faq.ninja250.org/wiki/How_do..._the_valves%3F |
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June 8th, 2021, 10:08 PM | #18 |
ninjette.org newbie
Name: lora
Location: palm springs cali
Join Date: May 2021 Motorcycle(s): 02 250R Posts: 9
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i freaking love intelligent men!!! thank you so much for sharing your knowledge with me!
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