bike running hot

[llewellyn]

RE: Srad 750v 1997

Hi guys.

Weather was hot today so I decided to take the bike out. I was at traffic lights, and the bike just cut out. I tried to re-start, the engine was turning over but not firing. I left the bike for about 15 mins and she started fine so I took her home. Once home, she cut out again. Same as before, tried a re-start but nothing, left the bike for 10 mins and bingo, started.

I just started the bike up again and she idled up to 107oc then the fan kicked in and brought her down to 100oc. But as soon as the fan stopped, she started climbing again to 107oc. Also she idles like shes missing. If I leave the bike cool to about 80oc, she starts. But anything over that and it's a no no.

Any ideas what the problem may be, or what I can do or what to look/check for?

Gutted I cant take her out in the nice weather

Cheers.

[Casper]

Could be

Buggered thermostate.
Air block.
Low water.
Rad/expansion cap seal gone.
Fan temp/switch buggered.
Water pump on the way out.

[bikenut]

hi dude,

so, is thermostate working properly ( opening at what degrees )and good flow when open, any cold patches on rad when hot!

valve clearances where done when? and hows the fuel?

some pics would be good for the site.......

[Kradmelder]

[russell210276]

valve clearances

but i would lean more towards a fault coil thats breaking down when hot then when it cools works again.

[sickpup]

[llewellyn]

[llewellyn]

[llewellyn]

[Casper]

Worth doing the simple stuff fist mate as you could be spending cash on this that and the other only to find you had air in the system. Worth Draining the water and get fresh stuff if you dont know when last done. If you have the manual it should tell you how to test the thermostat. You stick it in a pan of water with a thermomoter and watch what temp it opens at. Your manual should tell you the right temp.

[llewellyn]

[llewellyn]

[llewellyn]

[mysterious_rider]

On the subject, Anyone know what the average running temp is? And whats too hot?

[Scotsman37]

Double check your HT leads going into the spark plug caps just in case one of them have come lose or has corrossion at the end of the wire, as that would cause it to idle wildly with poor electrical connection to the firing of the plugs.

With having to leave the bike for a while before being able to restart it sounds almost like fuel starvation, and so do you have an inline fuel filter I would replace or it's the wrong size inline filter not allowing enough fuel to flow through.

[Casper]

[Kradmelder]

[Shinigami]

Completely off topic but love the autobot sticker
____________________
Current: Honda City Fly CLR125 2003 Honda CB600F Hornet 2008 Yamaha FZ6 S2 + 1991 Kawasaki GPZ500
"Once you realize what a joke everything is, being the Comedian is the only thing that makes sense.

[llewellyn]

[Shinigami]

Why would you even consider removing it?! I'm gonna look where to get one for my next bike lol
____________________
Current: Honda City Fly CLR125 2003 Honda CB600F Hornet 2008 Yamaha FZ6 S2 + 1991 Kawasaki GPZ500
"Once you realize what a joke everything is, being the Comedian is the only thing that makes sense.

[Shinigami]

Why would you even consider removing it?! I'm gonna look where to get one for my next bike lol
____________________
Current: Honda City Fly CLR125 2003 Honda CB600F Hornet 2008 Yamaha FZ6 S2 + 1991 Kawasaki GPZ500
"Once you realize what a joke everything is, being the Comedian is the only thing that makes sense.

[llewellyn]

Just drained the rad/coolant and flushed it out before re-filling 50/50. The bike stil idles hot, but I'm thinking that maybe that's normal for a 97?

Took her out for a spin and on the motorway she reached 81oc max with a low of 74oc. And she didn't seem to go over that. So maybe the mixture from the previous owner was too rich or not rich enough. I know for a 97 GSXR the running temp should be around the 90oc or maybe more on a hot day, so with a bad coolant mix this may have caused the problem. Thankfully she seems to be running ok for now. But when I got more time I will take her out for a propper run and see how she goes.

I cant check the plugs for the wild idling yet as the prev owner has rounded off the allankey bolt on the fuel tank (amongst others) so I cant lift it. When I got time I'll sort it out and get back.

Cheers for the help guys, I really do appreciate it. Top class forum. Think I'm gonna hang around for a while

[Vincent]

Boats are "She"s, mass-produced bikes and motors are "It"s
____________________
Space Is Deep

[llewellyn]

[Vincent]

Swiss Tony ?
____________________
Space Is Deep