rf9rider

Sorry, i don`t know a lot about using the 750 crank, all i know is the Ace or FZR1000 engine can be built into the YZF750 casings, thus keeping the original engine number.

8000rpm indicates a problem with the fuel level indicator circuit Check the wiring connector that goes to the tank.

YZF750 is the same. In fact, the rear wheel is the same.

Very nice, best colour for the YZF750. Just needs some white mirrors to finish it off. (Then you could sell me those black ones)

Cheers mate. Looking at something similar to the old paint job, either red,white and black or yellow,white and black, with the Yamaha speedblocks again. Or might go with something along the lines of the red,white and blue OW01 scheme.

Its been a while, been busy working on the house, but managed a little more on the bike. Finally got around to fitting the YZF750 bodywork. Had to jiggle a few brackets, but all on. Just needs tidying and respraying.

These might help. This is an Ace, i just moved the electrics due to modding the rear end.

No probs mate, are they the stainless exup-free headers? Be interested to know how it runs with them fited.

340mm from mounting bolt hole centres.

The Goldspots will fit, but make sure they`re not the later radial ones. The Goldspots are same as Bluespots, apart from the pistons are lighter, less prone to seizing and a little better performance. You`ll also need the R1/R6/Thunderace master cylinder, as the original FZR master cylinder will make the brakes feel "wooden"

If you wire the valve open, you`ll have a big flatspot under 3500-4500 rpm. If you get the exup free headers, expect to do a little re-jetting. There is quite a weight saving with the new headers, about 7-8kg if i remember rightly. I have them fitted to my Ace, but the cam overlap is different between the Ace and YZF`s, so theres no need for re-jetting the Ace. The only reason i fitted them was the Ace headers are made from cheap metal and rot quickly, and theres no need to worry about servicing the exup valve. If you don`t mind servicing the valve, spend your money elsewhere as i don`t feel theres any power gains with the new headers. And if you have flatsides on your SP, might be a nightmare setting them up correctly?

Nooooooo, the R1 tail doesn`t suit the shape of the Ace, looks horrible in my opinion.

Best oil for the YZF750`s is 10/40 semi synthetic.

As said in your other post, if the Exup valve is seized/not working, you will find under 4000 rpm it will feel gutless. The YZF750 will rev out at 13,500, so you got plenty to go yet. You have to work these motors to get the benefit.

No worries, let us know how you get on with the new headers.

Dodgy Exup valve = crap performance under 4000 revs. It might be the cables just need adjusting or the valve needs lubing.

They claim that the headers are a direct replacement with no setting up required, although i`d expect to do a bit of tuning to the carbs. It may just need the carbs setting up or at the worst a different set of jets, although much easier to do this than try to set up your original headers with the valve removed. And on the plus side with the new ones, no more Exup valve to service!

Have a looky here, includes there phone number http://www.exup1000.co.uk/phpBB2/viewtopic.php?t=7894

You can get a set of stainless aftermarket pipes with no Exup valve, but the FZR will still need a small ammount of tuning. I bought a set for my Thunderace, bolted straight on, no tuning required, but the Ace and FZR have different ammounts of cam overlap. Have a look on Ebay, Sandybikespares is where i got mine from, good people, find there listings and speak to them on the phone first if your not sure.

He says he still has the Exup servo fitted, so no problem mate. The CDI/ECU only controls the servo motor, its really not a problem.

Can`t remember exactly, but the later YZF750`s has the TPS (Throttle position sensor), i`m sure i read that its something to do with that.

The FZR1000 Exup valve is the same as the YZF750. (its the only bike that shares the same exup valve with the FZR1000) The valve cover, pulley wheel and cable bracket are the same on the Thunderace, Early R1`s, YZF750 and FZR1000. It will run sluggish below 4000 rpm without the valve, and its a long/costly job to try and re-jet around the problem.

Seat unit conversion is just about finished, just needs a respray.

Had to use the Ace battery box, as the Ace battery is taller than the YZF750. Then plastic welded this to the YZF750 undertray. All the wirings done, had to move the fuse box, extend and move the starter relay and reroute the negative battery lead. Rewired the rear light and number plate light. Had to modify the YZF750 seat to fit, just chopped the bottom front tab off the Ace seat and fitted it to the YZF750 seat, just needs tidying. Made an exhaust hanger bracket from 2mm ally, just needs a little reshaping and finishing. Only issue is the shock reservoir, had to move it under the frame, it might catch the hugger when i test ride it, see what happens. Just needs the seat cowl spraying, then its roadworthy.

I`ll always be modding it.