Tacho shoing x2 RPM
Posted: 02 Aug 2020, 22:35
Hi,
I just bought a 'new' Zephyr 750 C2 last week and am very much enjoying it, not haven ridden a big bike for 12+ years.
Until yesterday, the tacho showed the correct revs, but has switched to showing something close to double.
Doing 40 in 3rd was showing about 5000 RPM - but I looked down and saw 10,000rpm!
If I go faster, the rev counter needle points straight down.
The battery seems fine - no problems starting and measures about 12.7v. I've been out a few times with it like this, always with the headlights on, and I just put it on charge and it shows 75% charged, so it appears to be charging OK - no alternator or voltage regulator issues
I've fitted an after- market alarm, but that was days ago and I've used it since then and the tacho was correct, so I don't believe that it the issue.
Any ideas?
Thanks!
I just bought a 'new' Zephyr 750 C2 last week and am very much enjoying it, not haven ridden a big bike for 12+ years.
Until yesterday, the tacho showed the correct revs, but has switched to showing something close to double.
Doing 40 in 3rd was showing about 5000 RPM - but I looked down and saw 10,000rpm!
If I go faster, the rev counter needle points straight down.
The battery seems fine - no problems starting and measures about 12.7v. I've been out a few times with it like this, always with the headlights on, and I just put it on charge and it shows 75% charged, so it appears to be charging OK - no alternator or voltage regulator issues
I've fitted an after- market alarm, but that was days ago and I've used it since then and the tacho was correct, so I don't believe that it the issue.
Any ideas?
Thanks!