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early eng diff's
Posted: Wed Jan 07, 2015 1:29 pm
Author: baz
does any one know roughly what the eng numbers were in 73 when the early engines with the wonky 3 on 903 and the slim timing chain adjuster etc changed to the more common type you see........cheers
Posted: Wed Jan 07, 2015 2:51 pm
Author: malmojoe
I guess it changed when they added the cam chain tunnel o ring. Don't know when though. Z1A >20000?
Posted: Wed Jan 07, 2015 3:36 pm
Author: baz
malmojoe wrote:I guess it changed when they added the cam chain tunnel o ring. Don't know when though. Z1A >20000?
it was way earlier than that i think pal
Posted: Wed Jan 07, 2015 3:43 pm
Author: malmojoe
Just a guess.
Posted: Wed Jan 07, 2015 4:10 pm
Author: wilsonsjw11
Baz,
I think the early cam chain tensioner housing was fitted to the first 4000 odd bikes.
Regards
Steve
Posted: Wed Jan 07, 2015 4:11 pm
Author: z2.john
Early block with the 'wonky' 3 as you put it was circa 14300.
Thin cam chain adjuster was up to circa 10000
Posted: Wed Jan 07, 2015 4:57 pm
Author: baz
z2.john wrote:Early block with the 'wonky' 3 as you put it was circa 14300.
Thin cam chain adjuster was up to circa 10000
that sounds about what i thought, but iv'e got an eng here with all the early bits on it, short head nuts, wonky 3, slim chain adj, etc, the head as even got the tool marks in the fins around the spark plug holes, all pointing to an early eng ?? but eng number is in the 17000's.
does'nt look like its ever been apart either
Posted: Wed Jan 07, 2015 4:58 pm
Author: wilsonsjw11
wilsonsjw11 wrote:Baz,
I think the early cam chain tensioner housing was fitted to the first 4000 odd bikes.
Regards
Steve
Baz sorry for the bum steer
Regards
Steve
Posted: Wed Jan 07, 2015 6:02 pm
Author: baz
wilsonsjw11 wrote:wilsonsjw11 wrote:Baz,
I think the early cam chain tensioner housing was fitted to the first 4000 odd bikes.
Regards
Steve
Baz sorry for the bum steer
Regards
Steve
no probs pal .......
Posted: Wed Jan 07, 2015 9:37 pm
Author: z2.john
baz wrote:that sounds about what i thought, but iv'e got an eng here with all the early bits on it, short head nuts, wonky 3, slim chain adj, etc, the head as even got the tool marks in the fins around the spark plug holes, all pointing to an early eng ?? but eng number is in the 17000's.
does'nt look like its ever been apart either
Baz,
The engines with the wonky 3 are the ones below 14319 and those NOT in the ranges below
Z1E 14319-15096
Z1E 15948-16458
Z1E 16533-17088
Z1E 18270-18379
Z1E 18442-19079
The reinforced adjuster started to appear around the 10000 engine with a mixture of engines ranging from numbers (approx.) 9000-11000 either having the old or new adjuster