1983 GSX250S Build

[mike-s]

Oh, well it's the $45 one that sounds like the one needed, combine that with a threaded adapter i linked to earlier for 12mm, and that's deal done.
I've heard that the push-in one is a plain joke as it comes out unless you've got superman hands.

[landshark]

See how the compression test goes, if its no good, it might be worth putting another engine in it? Might see whats legally involved with putting a bigger engine in.

It would be simpler and easier to fix you engine or buy a bigger bike i reckon.

[mike-s]

Simple indeed. If compression is down, then take it apart, check the ring wear, check the barrels for oval wear, (0.1 is the tolerance from what i remember), check the valves are seated and sealing properly (a properly equipped engine rebuild autoshop can check this for you, if they are nice they will do it for free) and if they aren't sealing they can tell you just how bad they are leaking.

If you start getting big end wear, like your getting crank play or you suspect one of the big ends has worn and the engine needs to be totally split, that is when it goes from being a couple hundred dollar inconvenience (if doing the labour yourself) to costing a lot more money.

Also if you DO end up having to redo the barrel and get new pistons (newaint cheap) i can help as i accidentally bought 4 sets of 0.5mm oversized rings i have yet to offload onto ebay and will trade 2 sets for some beer.

[Woodsy]

Hmm looks like its the headgasket leaking not the base gasket, for ****s and giggles i have contacted the local suzuki dealer for a price on the gaskets, he never has anything on file for my bike and always has to fax someone in order to get the parts and prices, and not surprisingly i very rarely hear back from him!

[Woodsy]

Hmmm very interesting today, Went to start the bike and the starter motor was really sluggish, to the point where it stopped. I sat the bike up and tried again and it was fine.

Tonight i went to start it, this time it was upright, same problem, the starter motor couldnt turn the motor, i give it a rest for afew seconds and try again, there is a THUD between my legs and the bike coughs and splutters and eventually comes up to revs. I'm assumeing that was a backfire out the carbs, so i will have to check the filter to make sure it isnt a molten mess.

Overnight the bike leaked abought a 10cm puddle out the air box hose that runs to the ground. I'm assumeing my petcock is leaking, the bike is getting hard to pull off from the lights too, it feels sluggish.

I checked the oil and it does not smell fuelly at all and it isnt watery.

Could any of that have caused the gasket blow out from the day before?

[mike-s]

I'd check the sump to make sure that that the fuel hasn't dumped through to there. I had similar symptoms after not using it for a month and it turned out i had 2 litres of petrol in the sump!

[Woodsy]

Will drop the sump this afternoon, fired it up again this morning and it locked up again, starter motor wouldnt even budge, put the bike in gear and rocked it back and forth and it fired up... Something weird is going on...

[landshark]

Sounds like you petcock is fvcked?
Did you buy a new one after the last lot of problems you had with it?

[Woodsy]

I'll pull the petcock off tomorrow and check it out, i didnt buy a new one last time, just got one that still had a soft diaphram.

[Woodsy]

145 and 150 psi per cylinder & the petcock is stuffed, the plugs are wet and black.

[mike-s]

That's a good start,145/150 is under 5% difference. Have the top end off and replace the gaskets and you are done. Something else to consider is maybe giving the carbs a once-over while you are at it. Something simple but important is checking the cv carb is sealing, i.e.you want this, you don't want this.

[Woodsy]

yeah i'll give them a clean out too, will check the diaphragms they are bloody expensive too! I've decided any parts i need i will get from the US or the UK.

[mike-s]

It may be them being leaky or just a wonky install that can be fixed by dissasembly and a good old tidy up .

[Woodsy]

i know they dont leak air, as i sprayed them yesterday with some carb cleaner and the revs didnt change and they have new o rings on the carb to engine rubbers. Will price up my gaskets tomorrow.

[landshark]

Buy a genuine petcock, it will cost more, but will save you time and money in the long run.
I have done the rebuild, an aftermarket one, and now i have a genuine. I would only buy a genuine one from now on.