From firstname.lastname@example.org@21:1/5 to Angelo on Tue Jun 9 15:13:22 2020
On Thursday, March 11, 2004 at 6:46:22 AM UTC-5, Angelo wrote:
Hi, my XS750 triple does not start after a top end job. I'll
appreciate any advise as I am at my "wits" end.
Done so far:-
1) Bored out cylinders and replaced pistons and rings with 1st
2) Replaced base, cylinder head and tappet cover gaskets with new.
3) Set cams and timing disk to marks and 1F TDC respectively.
4) Checked "free" rotation by turning crank with a spanner.
5) Oil and then attempt to start.
After many attempts with no luck just the odd backfire, checked
compression which was totally lacking in nos. 2 and 3, and low in 1.
On suggestion of mechanic friend that I may have set timing out by 180 degrees, reset timing accordingly.
Still no luck but more frequent backfiring, now compression is totally lacking in nos.1 and 2 and hign in 3 !!!
I do not believe that I have damaged the valves as I have always
checked that the crank rotates freely by hand.
Any suggestion on how to troubleshoot further, and how to make sure
that TDC is on the power stroke as the Haynes manual does not have
BTW. I have an electronic ignition.
1979 Yamaha XS750
My bike exactly, but it will start up on the first try every 2 weeks, runs great, shut it off and it wont start for another 2 weeks, cranks and cranks. Has a new rectifier and still the same