Hi Guys,
been some time since Ive been on the forum. back now wit another project!

yesterday I scored a szr 660 yammy. I dont know much about these bikes but hope to find out more as I go along.

apparently they were only released for 2 yrs up to 99. they have a 5 valve xt660 engine same as in the mz660 mastif & maybe the raptor 660 quad bike and the tenere 660.

It's liquid cooled and has a huge oiltank strapped to the front lower left side of the engine.

These are made by Belgarda italy and have paoli USD forks, brembo brakes and are reknowned for excellent handling (well, according to the info i got online).

the actual bike isnt in bad condition, but I just cant wait to start changing things around! To start with I'll loose the ugly pipe and fit a spare akrapovic to it that I had on a ducati.

Tonight I dropped off the cheap looking turn signals and fitted LED units to it.

Only problem is it has 64,000kms on it and I think the rings are shot. Its burning a little smoke and the engines a little worn sounding.

what I hope to do is stroke it and slap in a bigger piston to bring it up to 720cc (info found online). This will give it a new set of rings and some more power, I'll do the bearings at the same time.

has anyone had any experience with performance mods on these engines? any advice appreciated!

another plan was to keep my eyes open for a damaged xt660 r/x/z at the auctions and do a full xt660r engine swap (EFI and all, loom, dash, etc etc...)... but they are few and far between and auctions get top dollar for them.


the main thing was making sure the tank and airfilters are able to be fitted into the szr frame.
the 660r has efi and the tank may need a fuel pump fitted inside it (or would an external pump be more advisable?).

ok, another question... I have a wrecked xt660r frame, ECU, loom, airfilter & throttle body thats doing nothing. Im toying with the idea of fitting the 660R loom etc to the earlier 5 valve engine. has anyone heard of anyone doing this? One thing is you would need to make a manifold to split the single round throat into two intake tubes to mount to the earlier model head.

One thing that had me wondering was there was a sensor Ive saved that bolted into the gearbox. I dont know what this was. maybe some kind if a knock sensor or crank angle sensor or something. could this be just left out or is it an integral part of the tuning?

the bike is fun to ride but would suit someone shorter as my knees are too big for the tank cutouts! either way, Im dying to get it out on the twisty bits!

i hope i put this in the correct section, admins welcome to move it or edit if needed.

any input into these bikes would be greatly appreciated!

Wow very interesting and it looks truly lovely!!!! I am sure that Kev or the other boys can help, I have never seen or heard of this model, I dont think that we every had it here in Europe.

__________________
(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....

thanks for the input mate!
I just did some more research. I found they do make a 2 into 1 carb manifold to run a mikuni bst 40 carb on the earlier xt660 engine. these are on the grizzly 660 quad bikes. I'm hoping the flow meter is the same diameter and can be fitted to the standard Carb head without too much modifying using the grizzly manifold.

my dash is damaged on the szr so swapping the complete loom/dash and efi would be a way around it.

I think the pickup I mentioned earlier could be a speedo sensor... this may be a problem as the earlier engine wouldnt have the speedo sensor that bolts into the casing... I would have to find a way around it...

maybe just sell the carb 660 engine and put some additional cash into getting an efi 660 engine.

I'll compare the frame mounts between the xt660 and the szr660 tomorrow to see how close they are....

any input Kev?

I must say I have not seen those before..never imported them
out here...looks nice..
is it as small as it looks in the pics...if so it must
be quite nimble...

__________________
Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...

hi pete, yeah mate its small alright! my knees dont fit into the tank indents thats for sure. there must have been a couple in NZ as a guy just told me on kiwibiker forum one sold for 6k there...
i posted a little info on them there...
PS: im from Pukekohe mate, but left there 30yrs ago!