i know its not a gs but the kawi fourms suck

[Jesse002100]

i recently got a 87 kawi ninja 750, i cleaned the carbs up and got it running really good but i think i screwed up big time LOL. after riding from ohio to new york on my way back it was hard to start it needed to be really pushed to get it going, so after the 7 hours home it hasnt started and i realised it was really low on oil i added almost 3 quarts and it only holds 4.1 my step father says i prolly scored the cylinders and thats why it was near impossible to start losing alot of compression. if this is the case which makes sense is it worth rebuilding the motor and would it probably just need to be honed and new rings or would i need a set of .10 over pistons or go all the way and go .30 over or so and rework it? i dont mean to post kawi on a suzuki forum but ive been here for awhile and the company is nice
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[tkent02]

Have you checked the compression?

[Jesse002100]

Have you checked the compression?

not yet i cannot get it running to get a hot compression check so i didnt tink it would make a reference because there is no manual i have found saying what it should be.

[rustybronco]

Dear, ran it low on oil...

there are some things you may also want to look at. if it has a plain bearing crank, did it score the either the crankshaft or bearings and had it sustained scoring to the head and camshafts.

[Jesse002100]

sounds delicious im thinking its junk cause im a dummy lots of work for a cheap old toy that will be a very pricy old toy

[reddirtrider]

If it was my bike I'd pull the motor and check it out during disassembly. Normally I wouldn't go right to that, but from what you described there's no way to tell the real extent of the damage by any tests, so why go through them.

Next time check your oil levels before each ride. It takes only a few seconds.

[Jesse002100]

yea i guess it will just be my if i feel like it bike i have the now up and running gs750 so im good for the season. just loved the 160mph speeds and the crotch rocket feel

[rustybronco]

If it was my bike I'd pull the motor and check it out during disassembly.

I agree with you with one small exception. I would pull the valve cover, if it is possible to remove without removing the engine, then inspect the camshaft for scoring. I then would borrow a bore scope to inspect the cylinder walls. if they both look ok, then chances are the rest may have survived.

[GregT]

It does have a plain bearing crank, and if it's picked up on a bearing, it's toast as these cranks crack when this happens.
Go straight to the core and drop the sump. Check what's in the bottom and on the pickup screen - if there's bearing material, look for another motor
If there's nothing there you got lucky & can look at the top end.

Greg T

[Jesse002100]

will do thanks for all the help guys ahh sump..... timely error of mine F**k me

[chef1366]

Just check the compression.
How's the charge on the battery?

[tkent02]

Just check the compression.
How's the charge on the battery?

He didn't want to do that.
Way more fun to pull expensive stuff apart anyway.

[chef1366]

Way more fun to pull expensive stuff apart anyway.

Tell me about it

[tkent02]

Tell me about it

Sorry, I forgot.
You doing OK?

And do you have any of those aluminum plugs that goes in the hole between the venturi and the float bowl?

[Jesse002100]

it blew 180-200 on all four cylinders so im going to tear it all apart here tommorow and i got a spare motor for 120$from the moto junkyard it fires on starting fluid so maybe its a good motor