Hey guys;
I have an issue on my 91 bmw r100rt. I thought I had a speedo problem, thinking it was reading high but I took my GPS with me and the speedo is almost perfect. So now I'm thinking it must be a tach issue. At 70 MPH it reads 5000 RPM.
I have a 120/90 18 on the back with 33/11 finial drive. I did the math and it should read 4000 RPMs. Who is right, me or the tach? Is this a common problem? Can it be repaired/adjusted or do I just need to live with it?
Thanks
I have an issue on my 91 bmw r100rt. I thought I had a speedo problem, thinking it was reading high but I took my GPS with me and the speedo is almost perfect. So now I'm thinking it must be a tach issue. At 70 MPH it reads 5000 RPM.
I have a 120/90 18 on the back with 33/11 finial drive. I did the math and it should read 4000 RPMs. Who is right, me or the tach? Is this a common problem? Can it be repaired/adjusted or do I just need to live with it?
Thanks