XS250 vs XS400

[BOGAN02]

Ive got an old project that i brought a wee while back and ive been rebuilding the carbs. I pulled out the carb slide and measured it. its only 27mm. Does anyone know if they came standard on the xs250? As im aware the bike is a 400cc but ive read up that they have 33mm mukuni carbys. So if anyone could shed some light on this for me it would be great.

[Supertwin Don]

When you are reading up on XS series Yamahas, the early ones were TWINS - XS250,360,400,500,650, - and the 400 probably did have bigger carbs. You talk about measuring the "slides" - the size of the carb is measured across the throat or bore, not the slide.

[BOGAN02]

When you are reading up on XS series Yamahas, the early ones were TWINS - XS250,360,400,500,650, - and the 400 probably did have bigger carbs. You talk about measuring the "slides" - the size of the carb is measured across the throat or bore, not the slide.

sweet cheers dude. Yea ive had the fella i brought the bike off, come round and help me sus out its a 250cc. And cheers for the heads up on the slides. haha few beers after 13 hours concreting does wonders to the head. haha So to everyone who has read my previous posts about this bike swap 400 for 250. hahaha