Thunderace/YZF750 project.

Post by **creedxup** » Mon Oct 21, 2013 4:49 pm

The difference between the 2 oil coolers are just the position of the coolant pipes, if you have the Thunderace ones all fitted, I'd stick with them.

Post by **creedxup** » Mon Oct 21, 2013 4:52 pm

I think the athunderace oil cooler is slightly bigger as well, so it's better to use that one.

wayno · Post by **wayno** » Mon Oct 21, 2013 5:04 pm

I do have the thunderace one fitted, but not plumbed up as yet, it will be by the end of the week though

wayno · Post by **wayno** » Wed Oct 30, 2013 11:32 am

I got the cooling system cobbled together, and the electrics are laid in place all ready for trying to fire the bike up. I would have tried it last night but realised that Yamaha switched from a single pump/level sensor to separate items on the thunderace and I didn't have my soldering gear to modify the loom to suit.

I have also managed to get the 750 downpipes wedged on for now, I may modify these to suit the ace engine for the time being until I know what I'm doing with the exhaust.

Couple of questions

1. When I filled the bike up with coolant I was met by a jet coming out the side of the barrel from an open M6 hole. What is supposed to go in here? I have a screw in there now

2. On the bottom of the 750 tank there is a spout that looks like it could be for a vacuum hose, is this the case, and if so whereabouts on the carbs does it connect? Take into account I have thunderace carbs so i will need to know where the ace vacuum hose connects (if it is in fact a vacuum hose that goes there).

Cheers

banner001 · Post by **banner001** » Wed Oct 30, 2013 12:41 pm

wayno wrote:I got the cooling system cobbled together, and the electrics are laid in place all ready for trying to fire the bike up. I would have tried it last night but realised that Yamaha switched from a single pump/level sensor to separate items on the thunderace and I didn't have my soldering gear to modify the loom to suit.

I have also managed to get the 750 downpipes wedged on for now, I may modify these to suit the ace engine for the time being until I know what I'm doing with the exhaust.

Couple of questions

1. When I filled the bike up with coolant I was met by a jet coming out the side of the barrel from an open M6 hole. What is supposed to go in here? I have a screw in there now

2. On the bottom of the 750 tank there is a spout that looks like it could be for a vacuum hose, is this the case, and if so whereabouts on the carbs does it connect? Take into account I have thunderace carbs so i will need to know where the ace vacuum hose connects (if it is in fact a vacuum hose that goes there).

Cheers

1. its probably the cylinder water jacket drain port, needs a small screw and copper washer (you can probably get away with not fitting the washer).

no idea about #2? is it not the fuel tank water drain?

wayno · Post by **wayno** » Wed Oct 30, 2013 12:44 pm

If it leaks I'll get a washer for it.

I suppose it could be that, or even just an overflow hose, I can't remember where the hoses go though

Thanks for getting back so quickly though

Fatdog · Post by **Fatdog** » Wed Oct 30, 2013 1:07 pm

The hose is the fuel overflow pipe.
The vacuum hose on the 750 tank comes off the fuel tap and connects to the intake piece just under carb number 1.
Hope that helps!

Post by **creedxup** » Wed Oct 30, 2013 1:09 pm

The extra pipe on the tank is a vacuum line that opens the tap to allow fuel to flow, it connects to a tapping on no 1 intake stub.

The coolant hole on the barrel is a drain, an M6 bolt fills it, I would think you'll need a copper washer on it though.

wayno · Post by **wayno** » Wed Oct 30, 2013 1:45 pm

That's perfect, thanks chaps

wayno · Post by **wayno** » Fri Nov 01, 2013 12:24 pm

I got everything connected up but no start up

I can smell the fuel so there's fuel getting through the system, I'll start all the usual other checks this weekend.

I did notice however that the rev counter is flicking up to 3000rpm indicating a fault with the throttle position sensor (TPS). Does anyone know if this means it's knackered or just in need of adjustment (is there a way of testing it?) Also does anyone know if this would stop the bike running or just make it run a bit crap at certain positions?

ta

r1wantone · Post by **r1wantone** » Mon Jan 20, 2014 5:59 pm

I the TPS isn't working or it's disconnected the bike won't start, Are you putting ram air filters on the bike?

wayno · Post by **wayno** » Wed Nov 26, 2014 12:26 pm

hi all, I'm back!!

After a year and a few months of moving out, moving in, moving out, moving in and refurbishing I have finally decided it's time to pick this project back up.

I have got a TPS from ebay and will be fitting it to the bike soon, how do I adjust them and know they are correct?

Post by **Stig** » Wed Nov 26, 2014 5:55 pm

I believe the FZR1000 EXUP front pipes will fit the Ace as they're basically the same engibe externally but the can fitting is different so you'll need a connecting pipe and end can

wayno · Post by **wayno** » Wed Nov 26, 2014 9:22 pm

That's alright it is only the front end that needs to fit, the back end I will sort when I have a stainless set

wayno · Post by **wayno** » Thu Nov 27, 2014 5:33 pm

Hi Stig, is it any year that should fit or just the later ru ones?

Exup 1000

Thunderace/YZF750 project.

Bit of an update, and some questions for you clever chaps.

Re: Bit of an update, and some questions for you clever chap