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
oversize.
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
this detail?

BTW. I have an electronic ignition.

Angelo
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

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<snberner60@gmail.com> wrote:

My bike exactly,

Have you noticed you're replying to a 16 year-old post, numbnuts? OP
could be dead by now.



--
BMW K1600GTL; Kawasaki Ninja H2, Yamaha 660 Ténéré;
Guzzi Le Mans Mk.2; Honda CD200, CB400F, Yamaha 125 NMax
More secure garages needed....
neil underscore murray at fastmail dot fm

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On Thu, 11 Jun 2020 07:12:37 +0100, totallydeadmailbox@yahoo.co.uk (The Older Gentleman) wrote:

<snberner60@gmail.com> wrote:

My bike exactly,

Have you noticed you're replying to a 16 year-old post, numbnuts? OP
could be dead by now.

And I bet the damn thing still won't start.

--
Futility Man

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Futility Man <null@futile.org> wrote:

On Thu, 11 Jun 2020 07:12:37 +0100, totallydeadmailbox@yahoo.co.uk (The Older Gentleman) wrote:

<snberner60@gmail.com> wrote:

My bike exactly,

Have you noticed you're replying to a 16 year-old post, numbnuts? OP
could be dead by now.

And I bet the damn thing still won't start.

Genuine chuckle here.


--
BMW K1600GTL; Kawasaki Ninja H2, Yamaha 660 Ténéré;
Guzzi Le Mans Mk.2; Honda CD200, CB400F, Yamaha 125 NMax
More secure garages needed....
neil underscore murray at fastmail dot fm

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