My front caliper seals have started to leak brake fluid.On removal of the caliper piston it is very pitted and requires replacing.Are these calipers fitted to any other model .M and P list a kit for a 250 d and e,are they the same calipers?

I would have thought a 78 bike would be an E model, yamaha designations for bikes started with A in 73 AFAIK , C would be 76 model. , and i seem to remember the XS250 being launched in 77 , anyway I think they where the same as the RD calipers of the day single piston swinging caliper

'78 can be C or D, calipers you can use are

some xs650's

some Rd's

xs400 sohc models except later ones

xs750 and 850

xs 1100

Thanks Merv and Drewpy for the info.The bike is a c disc model.I have seen pistons for a 750 on Yambits web site so I will try them.

Thanks Merv and Drewpy for the info.The bike is a c disc model.I have seen pistons for a 750 on Yambits web site so I will try them.

there's some stainless one on ebay from germany. they come up. try "the tired kraut"

Drewps are the pistons the same as the E model RD,s ?? in which case RDBitz AKA Nick chambers on ebay does em and rhe seals and will be cheaper than the tired kraut i reckon

merv

http://stores.ebay.co.uk/RD-BITZ?_rdc=1

yea, I think it is the E model. I used the gear lever shaft from that model for my bike