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KH400 no spark
Posted: Fri Nov 21, 2025 2:28 pm
by Mike 1958

Hi all, just going through the electrical systems. All working apart from when I kick it over I do not see a spark at the plug. I have renew all the electrical stuff with Rexβs speed shop.
The only thing I have not replaced is the fuse box. Fuse things look ok ???? Anybody got any advice please.
Cheers Mike



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Re: KH400 no spark
Posted: Fri Nov 21, 2025 4:00 pm
by Mike 1958
Had a chat with one off our members and he recommended checking the kill switch. On comparing with my old one it had a rubber grommet thingy fitted which was not present in the old one
I removed the rubber grommet thingy and refitted the cables as per my old one that was shot on the out side. And hey presto we have a spark.
Mike



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IMG_2026.jpeg
Re: KH400 no spark
Posted: Fri Nov 21, 2025 5:43 pm
by Mike 1958

Hi again, does the white plastic piece cover the on lead.
See photo. By the on lead I mean the black middle one.
Cheers Mike



Re: KH400 no spark
Posted: Fri Nov 21, 2025 7:08 pm
by Triple Parts
If it's a repro switch, it is a known problem...
viewtopic.php?t=21468
Re: KH400 no spark
Posted: Fri Nov 21, 2025 8:53 pm
by Mike 1958
Hi triple parts, thanks for the advise and link to topic. Switch came with the bike, receipt from Bertramβs.
Cheers Mike



Re: KH400 no spark
Posted: Fri Nov 21, 2025 8:54 pm
by Mike 1958
Bertrumβs i mean
Re: KH400 no spark
Posted: Sat Nov 22, 2025 9:37 am
by Triple Parts
Yes, Bertrums are a "box shifter" rather than a specialist supplier who tests and modifies them to work correctly

Re: KH400 no spark
Posted: Sat Nov 22, 2025 12:28 pm
by Mike 1958
Hi, you or Zpower arr always my first port of call.
Keep up the good work guys my KH400 is almost finished now, just the tank to fit. Ready for riding next spring
