Rasta Ratskins
Cobble it back together and sell as a parts bike.Originally Posted by crashalots
use this money and what you would have to spend on repairs to buy something decent.
Something you can test ride before you buy.
that is, unless you really want a project?
Only a Rat can win a Rat Race!
No8 Wire Extraordinaire
On reflection it would be hard to find at a wrecker, they likely would have weighed it in if it hadn't sold by now.
Don't you look at my accountant.
He's the only one I've got.
Scooter boy
Yeah im strangely captured by these old GSX’s
It’s definitely intended to be a project, but I’m being careful not to spend too much on it.
Got the bike for the cost of the registration outstanding and keen to fix it up for under $1000
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C'mon lets ride....
An optoin might be a GS400 head and pistons. Or bore out the sleeves out and fit a GS450 head and pistons.
No8 Wire Extraordinaire
They were 2 valvers and even older. That would be a hybrid of uncertainty.
Don't you look at my accountant.
He's the only one I've got.
C'mon lets ride....
The GS450 is AFTER the GSX400. They ALL share the SAME bottem end.The GSX400 share the same frame etc as the GS450'
No8 Wire Extraordinaire
The 450 was an over bored 425 I believe, not sure if I've seen one here, itself derived from the 400. Yes the 500, both 400s and 450 and 425 all look like the same bottom end. Maybe you can swap them, are you sure this has been done or could you run foul of some innocuous change like a tensioner runner change, oiling hole etc? You'd want to be sure people have done it.
You're getting very preachy Bones. Do you need a coffee?
Don't you look at my accountant.
He's the only one I've got.
C'mon lets ride....
No sleep last night. Insomnia damnit. I'll take a little blue bill tonight. Better mood tomorrow hopefully.
Scooter boy
Bottom line is... While I’d love a GS450 mod which would make it a cool and one-of-a-kind build, I just want to get the GSX running with minimal effort and cruise on her on the weekends.
I’ve found 2 replacement heads so far and both of those were cracked too.
I’m going to pursue getting my cracks TIG’d up by a friend for some beers (he’s a certified welder but not a machinist), and then go to the reconditioning shop only to reset the 4 valve seats. That should save some money.
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Anorak
Talk to Grumph hes played with a few.
https://www.kiwibiker.co.nz/forums/m...p/29978-Grumph
Kinky is using a feather. Perverted is using the whole chicken
No8 Wire Extraordinaire
Have you tried podcasts? If they don't send you to sleep at least you get entertained.
Don't you look at my accountant.
He's the only one I've got.
Scooter boy
Yeah I messaged him on Grumphv2
He knew exactly what I was faced with. He guessed - correctly - that I’d struggle to find an uncracked head.
He also felt there was little value in spending too much time or money on a GSX, hence why I’m keen to remedy it as cheaply as possible
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C'mon lets ride....
Good idea. Thanks.
Low personal B.M.E.P.
Lotta bullshit being taken as gospel on this thread.Yeah I messaged him on Grumphv2
He knew exactly what I was faced with. He guessed - correctly - that I’d struggle to find an uncracked head.
He also felt there was little value in spending too much time or money on a GSX, hence why I’m keen to remedy it as cheaply as possible
Sent from my iPhone using Tapatalk
Motors - the GS400 and 425 have roller bearing cranks - not interchangeable with 450/GSX400. The GS450 and GSX400 have plain bearing cranks - dimensionally identical and interchangeable.
The GR650 has pretty much the same plain bearing crank and it can be swapped in - or the 650 top end put on a plain bearing bettom end.
the GR does use a morse camchain which involves swapping cam sprockets to suit whichever crank you use.
The 450 top end - or the GR650 top end can be put on your GSX400 cases. Machining required. GSX750 pistons can be used in a GSX400 with a 1.25mm barrel spacer.
Simply having your mate weld the head is likely to produce more problems. As I've told you, the right way is machine all the ex seats out, weld up EVERYTHING remachine and fit new seats. Retap plugs smaller - usually 10mm.
Welding the visible cracks is likely to loosen the inserts. Wasted time IMO
Heads from overseas are possible. Aussie and Canada got them new. Some did get to the UK.
Low personal B.M.E.P.
Site won't let me edit a post.
What i forgot to mention is that a GS500 top end will go on your cases. They're a big bore slightly restyled 450 and use the same bottom end - but again a morse camchain.
Whole 500 engine would drop in I think.
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