February 28th, 2020, 05:30 PM | #1 |
ninjette.org member
Name: Eli
Location: BC Canada
Join Date: Feb 2020 Motorcycle(s): 2008 ninja 250r Posts: 21
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What maintenance to do while bike is torn down
OK, so I bought a 2008 ninja 250r w/ 32.000kmfor my first bike back in fall. I bought it not running (properly). The previous owner had overfilled the engine oil so much that it got sucked into the airbox where it leaked out and plugged the filter. The result was a leaky bike that didn't run right so I got it cheap.
I did do a compression test which came to about 125-130psi Here's a list of things I've done, or am planning to do still. 1. Change engine oil & coolant, spark plugs, air filter 2. Rebuild carbs 3. Rebuild front shocks 4. Replace worn brakes (not sure if discs are shot, will need to measure) 5. replace rear, possibly front tire. now, is there any way I can tell whether the rear shock is shot without riding the bike (and putting it back together first)? Since oil leaked from the airbox the shock is covered in oil as well. Also, if not necessary, id rather not do a carb sync and valve lash adjustment as those are both very lengthy procedures. Is there anything I am missing??? Anything that should be done while I've got the bike torn apart? Any input is appreciated, thanks!! |
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February 28th, 2020, 06:32 PM | #2 |
ninjette.org guru
Name: C
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I am currently doing swingarm, uni track, servicing as well as wheel bearings.
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"It ended up being the loose nut behind the wheel" |
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February 28th, 2020, 07:45 PM | #3 |
ninjette.org member
Name: Eli
Location: BC Canada
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Thanks, how many km's is your bike at?
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February 29th, 2020, 04:07 PM | #4 |
ninjette.org guru
Name: C
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Sitting around 7200 miles.
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February 29th, 2020, 07:09 PM | #5 |
ninjette.org certified postwhore
Name: AKA JacRyann
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MOTY - 2018, MOTM - Nov '17
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With 32 000km on clocks, without any records, you should at least measure valve-clearances. Not that difficult at all with feeler-gauges. Only if they are out of spec would you need to remove cams to adjust. These bikes run like crap when valve-clearances are out. You also risk burnt exhaust-valves; very time-consuming and costly to repair.
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March 3rd, 2020, 02:39 PM | #6 |
ninjette.org member
Name: Eli
Location: BC Canada
Join Date: Feb 2020 Motorcycle(s): 2008 ninja 250r Posts: 21
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Thanks, C
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March 3rd, 2020, 02:42 PM | #7 | |
ninjette.org member
Name: Eli
Location: BC Canada
Join Date: Feb 2020 Motorcycle(s): 2008 ninja 250r Posts: 21
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Quote:
Also, since the engine probably burnt some oil from the soaked filter, there's probably a lot of carbon in there. Any suggestions for removing that other than giving it some seafoam when it's running? thanks for the input! |
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March 3rd, 2020, 04:55 PM | #8 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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No need to remove heads to measure valve-clearances. Just take valve-cover off top and you can slide feeler-gauges between cam-lobes and valve-buckets. Procedure's in manual and very simple.
Seafoam is pure snake-oil, stay away! As test, pour some Seafoam on asphalt surface and watch what happens. NOTHING! Pour some Techron concentrate on asphalt and you'll see it start to dissolve! Absolutely ONLY cleaners that actually work is those with high levels of PEA - PolyEtherAmine (+50%). Might be only 5 products on market that has high enough levels of stuff to actually work. - Red Line SI-1 - Techron Concentrate Plus fuel-system cleaner - 3M Max Strength Fuel System Cleaner #08814 - Royal Purple Max Atomizer 18000 - Gumout All-in-One (they've reduced PEA concentration in recent years, might be off this list soon) BTW - Seafoam is proof that marketing works; snake-oil from gypsies, selling ice-cubes to Eskimos! It's similar to the '80s marketing campaign for STP Oil Treatment. Ended up costing Granatelli millions and millions in class-action lawsuits... |
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March 3rd, 2020, 08:34 PM | #9 |
ninjette.org member
Name: Eli
Location: BC Canada
Join Date: Feb 2020 Motorcycle(s): 2008 ninja 250r Posts: 21
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Thanks for your reply!!
yes I meant valve cover not heads, got those mixed up. The manual calls them head covers so maybe that’s why... And I’ll get some techron cleaner. Do they sell that at the chevron gas stations? Last futzed with by drychain; March 3rd, 2020 at 09:44 PM. |
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March 3rd, 2020, 10:50 PM | #10 |
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Sure I think they have them at Chevron stations. There’s several varieties. Be sure to get “Concentrate Plus”.
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March 4th, 2020, 07:16 AM | #11 | |
Rev Limiter
Name: Jay
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Quote:
It was suggested to me by a Mechanical Engineer friend that works in the auto emissions testing industry. Not someone that's swayed by hype, or is easy to impress. In their tests it cleared heavy deposits on valves and in the combustion chamber in one tank. He was impressed. |
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March 4th, 2020, 08:53 AM | #12 |
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Name: Eli
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Perfect, that's what I need. Now, assuming that there's a lot of deposits on the valves, wouldn't that affect my clearance measurements? Like I said there was lots of oil and crap in the airbox so I'm sure some of that made it into the engine??
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March 4th, 2020, 08:54 AM | #13 | |
ninjette.org member
Name: Eli
Location: BC Canada
Join Date: Feb 2020 Motorcycle(s): 2008 ninja 250r Posts: 21
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Quote:
Perfect, that's what I need. Now, assuming that there's a lot of deposits on the valves, wouldn't that affect my clearance measurements? Like I said there was lots of oil and crap in the airbox so I'm sure some of that made it into the engine?? |
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March 4th, 2020, 12:33 PM | #14 | |
Rev Limiter
Name: Jay
Location: WI
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Quote:
They restrict and disrupt intake flow, and in the combustion chamber can cause detonation. |
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March 4th, 2020, 01:49 PM | #15 |
ninjette.org member
Name: Eli
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Awesome, thanks!!! Should get those done tonight and i ordered parts for the front forks, wheel bearings and new pads.
Anybody know how i can tell if the rear shock is gone or do i need to ride it for that? like mentioned above its covered in oil from the airbox |
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March 5th, 2020, 10:58 AM | #16 |
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Oh I forgot, you should check your cush drive as well.
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"It ended up being the loose nut behind the wheel" |
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March 5th, 2020, 02:04 PM | #17 |
ninjette.org member
Name: Eli
Location: BC Canada
Join Date: Feb 2020 Motorcycle(s): 2008 ninja 250r Posts: 21
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March 5th, 2020, 02:48 PM | #18 | |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
MOTM - Jun '18, Oct '16
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Quote:
https://faq.ninja250.org/wiki/How_to...the_cush_drive |
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March 5th, 2020, 04:19 PM | #19 |
ninjette.org member
Name: Eli
Location: BC Canada
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Awesome, thanks!
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