Piston ring - fzr250 86 2kr

[ducatilover]

Probably not but it may be similar enough...

[Shak]

also guessing that i cannot use the shim measurement chart from the 400 manual..?
any recommendations on the best place to buy shims are? (not kits as they are 100+) i can just find out what shims i need and purchase them only?

[ducatilover]

Bike shops tend to exchange shims
Shim chart from the 400 manual will work, although a micrometer and some very basic math will too

[Shak]

Ok I remeasured making sure timing marks are in line. Here are results.

Do I try and forcefully fit the largest I can? Or fit the largest guage in with little effort into the gap? Because I was able to fit larger sizes with some force.

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[The Reibz]

fit the largest guage in with little effort into the gap

This... Well thats how I have done it. Others might disagree

[Shak]

ok thats what i have recorded on there, apart from piston 3 it should be .014 or even .012

[Shak]

http://img.tapatalk.com/d/14/02/27/equ6uhe4.jpgWas about to change shims but decided to remeasure again and not too forcefully.. results seem ok as they are within the range.

Sry for bad image. Thats .006 (smallest guage i have) all for intake and .010 and .012 for exhaust

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[Shak]

It should have a shit load more than that, unless he did the test cold.
If so, fire him, new compression/leak down test and consider checking the emulsion tubes and needles for being worn

I checked the tubes while cleaning out the carb. They seemed in good nick.

About the leak down test whats the best way without taking engine out? Youtube clip I saw was an engine out job

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[Shak]

Ahh I see. I need to buy a leak down tester kit for the bungs etc lol.. any mobile testers? I might have to ring around..

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[The Reibz]

Bro if you need to run a compression test then you can borrow my tester. I got no idea on leak down tests as I have never done one, when I rebuilt my falcon motor a compression test was all I needed to tell me that the head gasket was fucked.

I can bring my tester over on saturday if you want (weather shit so fishing is off) along with those rubbers. I don't think I have a 10.2mm adaptor for it though. A couple of the boys on here have borrowed it and it hasn't fit their bikes.

[Shak]

Bro if you need to run a compression test then you can borrow my tester. I got no idea on leak down tests as I have never done one, when I rebuilt my falcon motor a compression test was all I needed to tell me that the head gasket was fucked.

I can bring my tester over on saturday if you want (weather shit so fishing is off) along with those rubbers. I don't think I have a 10.2mm adaptor for it though. A couple of the boys on here have borrowed it and it hasn't fit their bikes.

that would be awesome, only thing is im not too sure how to exactly do the compression test my self, i had a look at some vids on utube though. are you able to guide me? make sure im doing it correctly? if your free that is, and i have a cricket game at 12 so will have to be done by 11am.. or another day is ok if you cant make it.

il keep reading on the compression test though

i might be able to get a 10.2mm adapter

Thanks again!

[The Reibz]

Its very easy to do. Pretty much you just turn the motor over on the starter and watch the compression build up on the gauge.
I got a feeling that cyl 3 has a sticking valve by what you have said. It actually takes a hell of alot of effort and abuse to fuck all 3 piston rings and for the amount of Km's your bike has done I would be highly surprised if it was a ring issue

[Shak]

http://www.youtube.com/watch?v=uj8YDwlILwY

this guy made it much easier.

(and i take all 4 spark plugs out? wont air escape from other pistons while testing?)

[The Reibz]

wont air escape from other pistons while testing

Yeah bro thats the whole point. That way you can tell if there is a leak between the headgasket surface from one cylinder to the other. Make sure the fuel is cut too.
its around $80 for a stanley compression tester at SCA, no idea where to get adaptors from

[Shak]

Ah right. Makes sense. I have a look. Saw one on trademe with adapter for 45 might be good to keep one handy for future as well. Thx


http://www.trademe.co.nz/motors/car-...-698986384.htm

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