[TimQ16]

Hello All
 I've put a new battery on my 535 GT and bow it won't start. Battery is the correct version, starter motor working well and I have a spark. The issue seems to be with fuel? When turning on the ignition and the engine switch I think there should be the sound of the fuel pump priming? This only seems to happen every 10-15 times I switch the ignition on, in between that I can just hear a click somewhere around the battery/under the saddle??? It won't kick start either, I'm convinced it's fuel flow related? Any help appreciated 🙏

[Nasher]

Check the fuel pump relay, mounted on the battery frame, you may have pulled a wire when replacing the battery.....

There are 3 relays, I believe the top one is the fuel pump....

[TimQ16]

I've checked all the wires to the relays and all appear to be as they should be, I'm wondering if it's a faulty/broken relay that needs replacing....I've read its quite a common fault on this model?

[gizzo]

Did you check the wires of continuity or just visually? The relays are mounted on the battery bracket so if there was a badly fitted terminal to a relay, changing the battery could indeed be the cause of a failure. The RE loom doesn't appear to be especially high quality...

Changing the relays is easy and cheap.

Good luck.

[TimQ16]

Cheers Simon I've bought replacement relays....hoping its that simple 🤞just a visual check of the wires so far...but it did start on the kick before the battery change....but not now 🙄

[TimQ16]

All relays changed, started second push on the button so hopefully the issue is sorted 👍 thanks for all the advice 👍

[Beeza]

Just hold the button down until it’s running. Mine always starts first time, eventually. 

It’s not a car; the starter drives an overrunning clutch so there’s nothing against have it spinning when the engine is running. The motor cannot over speed it.

[gizzo]

All relays changed, started second push on the button so hopefully the issue is sorted 👍 thanks for all the advice 👍

Woo!

[remartin]

I've just had a very similar issue with my 65 reg (2015) CGT. Following a read of this thread I thought I would try cleaning the contacts of the relays first as I'm too tight fisted to spend £s unless I have to! I did find some corrosion on one of each of the three relay terminals which I cleaned off as well as trying to de-gunge the connectors as well. I suspect this may only be a temporary fix and I'll have to buy new relays from Hitchcocks but it seems to be working at the moment.

[GUNR]

That's just what I did; fine grade sandpaper to remove relay contact corrosion and then a like smear of grease before reinstating the relay.

[TimQ16]

Bought mine from ebay £7.99 for 5 great quality and way cheaper than Hitchcocks