Xs1 1969 engine rebuild

Classics Junkie · Oct 28, 2019

Hello all members, I'm a new member from the UK on the long road to coplete restoration. Xs1 1969 build.
When I got the bike the engine was removed, not completely whole.
Barrrels missing, carburettors missing tank not serviceable.
I guess I am going to have trouble aquiring new original parts or good secondhand parts for refurbishment on this early model.
I was told the gearbox bearings are not available for this year as they are different on a 1969, wondering what the workaround is, maybe machining?
Perhaps some of the uk posters could recommend a good engine builder for a total rebuild after aquiring the missing parts.

gggGary · Oct 28, 2019

TwoManyXS1Bs · Oct 28, 2019

Here's some reference material.

http://www.xs650.com/threads/yamaha-xs1-xs1b-xs2-tx650-tech-bulletins-service-data-brochures.31022/

https://thexscafedotcom.wordpress.com/2014/07/17/xs650-xs1-xs1f-xs2-tx650-parts-lists/

billy icon · Oct 29, 2019

your in the right place for help and expertise , and welcome classics junki,
I to have a xs1 , yay

Rasputin · Oct 29, 2019

Welcome to the Madhouse.
Have you seen this?

Classics Junkie · Oct 29, 2019

Yes, I've tried to contact Spencer to view before the auction finishes, i Messaged him saying I could be in Reading in 1hour 30 minutes, just 15 minutes of your time, he give me the cold shoulder, he's exact words to both of my message "I'm not around".
As a reference do you know what colour or code this bike is, I had a 1972 Jenson interceptor that some colour.

Classics Junkie · Oct 29, 2019

billy icon said:
your in the right place for help and expertise , and welcome classics junki,
I to have a xs1 , yay

Thank You Billy icon, well it did not take long for a wealth of information corrrr, perfect for a information freak like me.

Classics Junkie · Oct 29, 2019

gggGary said:
Maybe the European market got the XS1 earlier than the US but I think the first year was identified as a 1970 model even if many were built in 1969.
The use of a website like partzilla will help you track down part numbers, show exploded diagrams, and model commonality.
A quick look through the XS1 diagram bearings shows they are the same as the later years.

An example

This Yamaha 93313-32005-00 BEARING, CYLINDER.#13 Not Available fits the following models and components:

Yamaha Motorcycle 1981 XS650SH Transmission

Yamaha Motorcycle 1980 XS650SG Transmission

Yamaha Motorcycle 1971 XS1B Transmission

Yamaha Motorcycle 1983 XS650SK Transmission

Yamaha Motorcycle 1974 TX750A Transmission

Yamaha Motorcycle 1978 XS650SE-11 Transmission

Yamaha Motorcycle 1979 XS650_2F Transmission

Yamaha Motorcycle 1973 TX750 Transmission

Yamaha Motorcycle 1973 TX650 Transmission

Yamaha Motorcycle 1980 XS650G Transmission

Yamaha Motorcycle 1978 XS650SE Transmission

Yamaha Motorcycle 1982 XS650SJ Transmission

Yamaha Motorcycle 1981 XS650H Transmission

Yamaha Motorcycle 1979 XS650SF Transmission

Yamaha Motorcycle 1972 XS2 Transmission

Yamaha Motorcycle 1970 XS1 Transmission

Yamaha Motorcycle 1974 TX650A TRANSMISSION TX650A - XS650B

Yamaha Motorcycle 1975 XS650B TRANSMISSION TX650A - XS650B

Yamaha Motorcycle 1976 XS650C TRANSMISSION XS650C

Yamaha Motorcycle 1977 XS650D TRANSMISSION XS650D E E006501- F

Hi and thanks gggG for the link, your correct my bike is February 1970 registered, seem that one gearbox bearing is going to be a problem to acquire. My existing bearings are ok, just plays on my mind not to change all for them.

gggGary · Oct 29, 2019

The good news is that we seldom hear of tranny bearing issues. Since later model bearings fit, suitable used replacement bearings shouldn't be that hard to find and it's a small enough part that shipping from the many US parts hoards shouldn't be onerous.
Depending on your goal, swapping in a complete later transmission may be a decent way to go since that close ratio (read tall first gear) isn't ideal for leisurely street use.
Dealing with an eBay vender may be a good choice since it appears they have a "reasonable" internal international shipping option.

Classics Junkie · Oct 30, 2019

That reassuring about the gearbox bearings,
my existing bearings seen good.
Thank you for the head up, that's a brilliant tip concerning 1st gear, not having previously ridden the bike or a xs650 before. 1st gear is missing from my original gearbox, but I have another set out of a 1970s box.
As to my intentions, I am very much a purist to my detriment, as aquiring early model parts seem difficult, replacement parts need to be as per year model.
Would my existing barrels fit on a later bottom end casing, not sure that's possible.
Many Thanks gggGary.

Xs1 1969 engine rebuild

Classics Junkie

XS650 Member

gggGary

If not now, When?

TwoManyXS1Bs

BBQ Hunter

billy icon

test pilot,gunnie pig, and all around experiment

Rasputin

XS650 Junkie

Classics Junkie

XS650 Member

Classics Junkie

XS650 Member

Classics Junkie

XS650 Member

gggGary

If not now, When?

Classics Junkie

XS650 Member

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