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Yamaha XS250 1978


Unk
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heat will help but with limited access your going to struggle, have you got a pic of the bolt in question ?

Will post it tomorrow if I have had no success :-)

Only can't do it now because I haven't taken the pic

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Cheers guys....I managed to get the screw off using an extractor tool.....great piece of kit, must invest in a set. Once that was out of the way the strip down continued and the top/bottom halves were split. The carcasses may go off for ceramic cleaning....not yet decided whether to have it done professionally or just give it a good clean myself as when the bike is finished I will ride it not stick it in the garage.....I do want it to look decent though.

IMG_1436_zpsc70ff648.jpg

On first inspection the internals look good with no noticeable wear to the big end bearings......

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Strip tease motor porn :smash: . Ice blasting does wonders to making parts look new.

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A quiet day today on the strip down front due mainly to a meeting with DREWPY where we exchanged dits....well I listened to his good advice and exchanged a few components.....eyed his 'flat tracker'....cracking piece of kit and looks a bag of fun to ride!

I guess it's what forums are all about....meeting new people and exchanging knowledge....I certainly benefited from it...

Anyway, back to the strip down.....more work tomorrow people......if there is anything you would like to see in more detail regarding the process let me know and I'll endeavour to show you as its all a learning curve

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Hey Unk me & Drewpy are off to the Manx Classic TT next August, it would be great to see you and your XS there, check it out interested,

that is if you think it will be finished in time.

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Yes TOMMY XS he did mention that you guys were going.....interesting......

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Yeh them four strokes will make good Anchor"s for the ferry,, :babyha: ,,, Just curious " the super[wet] dream had a balancer shaft in ther 250, canna see one in the XS ? I see its 180 degree crank, the brits were 360 :shrug: ,, I need some answers from you 4 bangers,,

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good to meet you today Unk :)

sohc xs are 180' cranks, that is pistons are 1 up 1 down at the same time so no balance shafts.

another guy from Wimslow PM'd me from the American xs400 site and has just bought an xs400.

He is building a flat tracker. Its a special so it has a stepped seat

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Ballance shafts make motors run longer, smother ,but, steal HP,ballanceing the motor parts on a 180 crank can run just as smoooth and make more HP per = cc. a part that has been removed from many a performance machine originaly equipted with one

Seems you getting on quickly UNK :popcorn:

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Ballance shafts make motors run longer, smother ,but, steal HP,ballanceing the motor parts on a 180 crank can run just as smoooth and make more HP per = cc. a part that has been removed from many a performance machine originaly equipted with one

Seems you getting on quickly UNK :popcorn:

Yeah seems to have been a bit of a breeze thus far but have no wish to tempt fate....I need to make a decision about whether I am going to have the engine ceramic cleaned for that 'just out of the crate look' or whether to employ my own labour and just get down and dirty with it. I'd like it to look nice but I am not into just producing a 'show bike' I wanna ride it like I used to back in 1980....cost is obviously a factor too.....been quoted £160 for the ceramic clean.....it's a tough call.....

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did drewpy tell you about the aqua blaster in Stockport unk?

http://www.josephpercival.co.uk/our-services/vapour-blasting-2/vapour-blasting-gallery/

Just emailed them....many thanks Airhead....

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Ballance shafts make motors run longer, smother ,but, steal HP,ballanceing the motor parts on a 180 crank can run just as smoooth

Intresing this,, been reading, The TX750 Yamaha had a chain driven balancer shaft, with no tensioner , what a foopa , :crazy:

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