Gsxr 400, compression 0,30,50,0

[owner]

Not good. My two week old bike just cut out at about 70km/h.Did a comp test and it failed misserably! Is there any gsxr 1992 400 left engines/heads out there?,Im looking for motor .I dropped the bike at a shop and said fix it, So I guess there is still hope
If its not to serious, lol . Is there any parts in the motor I should upgrade or things I check while its apart.
What about squeezing a K1 engine in there?
Has any one fitted a different engine to gsxr 400 ?

[Darkman]

Not good. My two week old bike just cut out at about 70km/h.Did a comp test and it failed misserably! Is there any gsxr 1992 400 left engines/heads out there?,Im looking for motor .I dropped the bike at a shop and said fix it, So I guess there is still hope
If its not to serious, lol . Is there any parts in the motor I should upgrade or things I check while its apart.
What about squeezing a K1 engine in there?
Has any one fitted a different engine to gsxr 400 ?

hey mate..I have the '91 as a race bike...fixing(well breaking) it up at the moment and all the parts are still available for these bikes..I have a manual and partslist if you are interested.

[owner]

Interested.
Does the engine still run? How much do you want for it?
When you say "all the parts are still available" do you mean new? or generally from wreckers
Is the "parts list" of all the stuff that you have, or a new parts list?
Arent fixing and breaking Two different things? What happened?

[sAsLEX]

Arent fixing and breaking Two different things?

not in most Kiwi garages!

[owner]

Good call. . I see now! darkman is not breaking it, he is fixing it.
and he will still require his engine. Dam it
What can I say I live in hope of finding an engine.
Cheers

[imdying]

Not good. My two week old bike just cut out at about 70km/h.Did a comp test and it failed misserably! Is there any gsxr 1992 400 left engines/heads out there?,Im looking for motor .I dropped the bike at a shop and said fix it, So I guess there is still hope
If its not to serious, lol . Is there any parts in the motor I should upgrade or things I check while its apart.
What about squeezing a K1 engine in there?
Has any one fitted a different engine to gsxr 400 ?

If it was running on all four, and just cut out, I'm guessing you didn't do the compression test correctly. Short of braking a cam chain and wasting the valves, it seems unlikely that all of the compression would dissappear on a couple of pots instantly?

[El Dopa]

Did a comp test and it failed miserably

What did you use to do the comp test? You HAVE to use the correct Suzuki part to do the comp test on these engines. If you don't, air leaks around the side of the tool and you get an incorrect result.

hey mate..I have the '91 as a race bike...fixing(well breaking) it up at the moment and all the parts are still available for these bikes.

Which version is this? Did it originally come with dual exhausts? Does it have USD forks? If the answer to either of these is yes, I'd possibly be interested in some bits.

[owner]

To imdying ;I took it to a suzuki dealer to do the comp test. That was their result 0,30,50,0 It took them 2 weeks! and yes it did just stop instantly no farting or spluttering just cut out.(so your betting cam chain aye) I thought CDI
Ive since taken it to a another bike shop to see if they get the same result. Trust no one
Suzuki said "it could be as simple as resetting the valves" ????
is this possible? or "as major as finding another engine"
To El dopa;I dont think darkman is wrecking his bike. correct me if Im wrong
because I need an engine
Cheers

[Darkman]

Interested.
Does the engine still run? How much do you want for it?
When you say "all the parts are still available" do you mean new? or generally from wreckers
Is the "parts list" of all the stuff that you have, or a new parts list?
Arent fixing and breaking Two different things? What happened?

sorry man..you must have misunderstood me..I am fixing the bike up for myself to race, but due to my lack of knowlage I am doing more damage to it than fixing it. All parts for the motor is available new, so you would be able to fix yours easily.

[owner]

laughing Yeah I got that after re reading your post. cheers for that. Its good to know about the new stuff too. aussie call wreckers, breaker's .weirdos

[rok-the-boat]

It could have sudden low compression on more than one cylinder if you have some bent valves - did you over-rev it?

[imdying]

Bummer, I was hoping it was only the test that was wrong

It would seem that if it was going fine, and then wasn't, then the valves are the most likely cause, given that the headgasket 'exploding' you would notice, and valves bending you would notice (although I would've thought you'd notice the cam chain breaking). Did you over rev it?

[owner]

well.... I just came down Twilight rd, Clendon and MAY have over rev'd it coming down the hill( I cant think of when, I was loving it so might not have noticed ). But I'd sat up and was kinda having a breather when it stopped . The motor was only doing about 7000-8000 rpm when it happened and
I didnt hear a snap crackle or pop
Ill find out soon. I ll post some pics of the damage
A few valves, couple of pistons, cam chain, seal & gasket kit + labour. times 3(for a rebuild)= any body got a engine they wanna sell???

[El Dopa]

Seriously, get a shop that know what they are doing (i.e. they actually have the CORRECT suzuki tool) to do the compression test.

My bandit (same engine as the GSXR400) was 'sold' to someone else (through a shop - on behalf of the owner), conditional on a compression test. It 'failed' the compression test at the shop, ONLY BECAUSE they used a generic tool rather than one that actually fitted the hole. The generic tool leaked and the reading was hell low.

The owner got pissed off, and yanked it from the shop as he knew it was compressing fine, and he was tired of being dicked around.

He sold it to me, and I've never had a compression-type problem with it. A couple of other relatively minor problems, but nothing compression related.

I notice you're getting zero on the test for two cylinders. Seems a bit odd to be getting zero, unless the piston is physically not moving in the block, which I really, really doubt.

What MIGHT be happenning is an electrical problem. Are you getting spark on all four plugs? what condition are the plugs in? I've had electrical and fuelling problems on the bandit which were quite easily fixed, even by a numpty like me (with a little help....).

It pays to have a reasonable idea of where the problem might be before dumping it in a shop. If you can check the spark and some of the electrics, if for no more reason than to eliminate them it might help. Is it turning over? Does it grind and crunch, or turn over smoothly? Does it spark/fire up, or just crank without sparking?

[owner]

I took it to suzuki shop I hope they had the right tool. but you cant stand over them and watch them work. I dont trust them which is why i took it to another shop to see if they have the same result. having no mates in the industry sucks balls