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View Full Version : new to sv's and bought a dead curvy

kaighn80
01-10-12, 09:29 PM
hi all, new here and in need of help.
OK so long story short, i was given an fzr400 with a dead gearbox, 1 fzr600 engine later (which a friend bought me for painting his zx6) and i then had an fzr4/6 which worked really well but was a bit tired and in need of some tlc (but had only cost me the the princely sum of £40 for service parts), throw in one throw away comment on a post on face book and the 1988 fzr was swapped for a 2000 plate sv, now the sv is clean with a few "choice" mods (which will mostly be put back to standard as and when they come up cheap on egay, but has unfortunately had some valve to piston interface action when the valve head dropped off the stem and smashed the granny out of the piston and head, barrel seems to have survived the incident amazingly, but with the bike came most of a spare engine which has a rear piston and a pair of conrods. so now i scour egay in search of a cylinder head, is there a massive glaring difference between the front and rear cylinder heads or can they be swapped? does anyone have a front cylinder head going spare? any ideas as to why the valve head dropped off? looks to be exhaust.

thanks for any help, its much appreciated.
sv_rory
01-10-12, 09:34 PM
what cylinder are you after?

I recently did some cylinder heads and they are marked front and rear. remeber that the exhaust is is on the front of thre front cylinder and on the rear of the rear cylinder.

you dont want to go swapping stuff around. it's best to replace with the proper part for the job
kaighn80
01-10-12, 09:40 PM
i need a front one.
sv_rory
01-10-12, 09:54 PM
How much are you willing to pay? ive got a front
kaighn80
01-10-12, 09:57 PM
how much do you want for it?
sv_rory
01-10-12, 10:08 PM
make me an offer
kaighn80
01-10-12, 10:17 PM
pm sent.
kaighn80
03-10-12, 11:07 AM
Ok having investigated the options of putting the rear head on the front I've discovered it is possible but with a bit of machining which would make the cost of doing it too much.
squirrel_hunter
03-10-12, 12:51 PM
Are you putting the rods from the spare engine in the bikes current engine and using the rear piston from the spare as a replacement for the front?
kaighn80
03-10-12, 12:57 PM
Yep that's the plan but I'll check the rods first see if I have a good pair out of the 4
chris8886
03-10-12, 02:04 PM
what's your location? it sounds to me like you know pretty well what you're doing, but going to see someone like sid squid/rictus (from the soho section, i'm afraid i don't really know anyone from the rest of the country well enough to say they can definately help (though there undoubtedly will be some!! (no offence meant with this comment))). i'm sure if you ask either of them nicely they'll be able to help you/point you in the right direction if you're a fair way away from london.
squirrel_hunter
03-10-12, 02:58 PM
What was the issue with the spare engine? And why replace the rod(s) on the current engine? Or is the front rod on the current engine damaged?
kaighn80
03-10-12, 03:17 PM
not sure on the condition of the spare engine but i suspect that the front con rod on the engine in the frame has taken a whack, either way i'd rather be sure than have to rip it all down and build it up again, the valve has been snapped off so i guess that the timing was a bit wrong, and the piston crown and cylinder head have taken a proper twunting so it stands to reason that the rod might be bent but i'll check.
kaighn80
03-10-12, 03:24 PM
oh also i'm in essex.
chris8886
03-10-12, 05:21 PM
oh also i'm in essex.

in that case would definately ask sid squid or rictus, they'll be able to help i'dve thought cos they're not too far away at all.