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General Category => Maintenance => Topic started by: Tapartacus on June 10, 2014, 11:40:48 PM

Title: Wonky tachometer
Post by: Tapartacus on June 10, 2014, 11:40:48 PM
Hi every one, the Tach on my 89 is acting up. Sometimes normal sometimes reading 3 or 4 thousand high. Of course the engine does not rev higher than normal and the bike runs fine. Any ideas?

Thanks,
Andrew
Title: Re: Wonky tachometer
Post by: Flynt on June 11, 2014, 12:13:16 AM
Quote from: Tapartacus on June 10, 2014, 11:40:48 PM
Any ideas?

Check the grounds at the coils...  the through-bolt that mounts them is a ground and caused the same symptoms for me when it was dirty...

Frank
Title: Re: Wonky tachometer
Post by: Tapartacus on June 11, 2014, 12:47:44 AM
Thanks Frank, I'll try that.

Andrew
Title: Re: Wonky tachometer
Post by: mr blackstock on June 11, 2014, 03:10:03 AM
G'day,

On my '85 I had problems with a bouncy tach, among other things.., I discovered that there is a grey wire from coil no.2 that goes to the tach, my wire had a high resistance, replacing it solved the bouncy tach and helped a misfire on my cylinders.

Hope it helps,

Gareth