drewpy

as from an xs400D, custom models have 16" rear wheels, high rise bars, different frames to accomodate a different seat. engines are the same maybe minor diferences in '80 with rubber mounted engine and oil sight glass.

coil primary resistance = 4 ohms (small wire and ht lead) secondary resistance 9500 ohms (small wire to other small wire) check ht cap not cracked and has continuity from lead

pilot jet blocked ,also check twin contacts (if fitted) to check timing/gap

either running very weak (check sparkplugs) or your ignition has somehow retarded. don't keep running it like that as you are getting partial seizures ( cutting out), does it run when cooled?

try asking here http://www.tr1.de/

I get the same measurments on mine and you should have 34mm carbs which are the same as the 400 so your good to go. A rebuild cost; get a keyster kit from ebay (canadian company) and send the lot off to a ultrasonic cleaner who does carbs (150$ ish)

take measurements and I'll check my 400 ones

any 34mm carbs should fit except 2 stroke ones (i think they are designed different due to the 2 stroke oil, but don't quote me on this) need to put on a dyno afterwards to get the fueling curve right

Chris, do a search on the forum as there's loads of stuff here. pm me if you are still wanting!

ho ho ho !if you ever find one NOS good luck!! rare as rocking horse do do's

the engine number indicates an xs650b '74 to 1975 but these had calipers behind the fork leg. The earlier 1972 XS2 had their caliper fitted at the front on the right side (viewed sitting on the bike) a swapped front end due to a collision could have happened in the past.

You're running too lean, screw in the air screws on the front of the carbs by equal amounts. If that doesn't help you need to check your connections from carb to cyl head and maybe look at buying new carb inlet rubbers as they crack with age and petrol (gas)

should do, both are 34mm mikuni's

in usa = 1983 Yamaha XS400K found this on motogrid for you http://www.motogrid.com/pages/parts/viewby...d/2/yamaha.aspx enter the above date etc and the service data there as well as part numbers. it is also known as 12n model which was very popular in Germany, which is where you will see most parts on ebay. http://translate.google.com/translate?hl=e...hl%3Den%26lr%3D uses google translator, you can pick up what they are on about (usually) unless you speak german and then you're quids in ) drewpy

if you do short journeys then the engine oil will not warm up properly and the condensation does not evaporate. I'd recommend changing the oil, warm the engine up, and give it an italian service every now and then!

just keep your eye on the disk offset, and be prepared to shim. xs605's had 2 different brake systems from earlier models to later.

never heard of that VIN all model codes are here http://www.cmsnl.com/faq.php?fq_catid=15 If you are sure thae bike was made 12/80 then the model year is 1980

If you want i'll measure mine with the spacers and then if you measure inside your forks you will get a clearer idea!

I would have thought £400 - £500 depending on how you sell it

£55 for shocks, couldn't make 'em for that!!

could be similar to my xs400 clutch in the fact that there is a worm drive under the case and the cable connects via a slotted arm. Either the nipple has broken off or the plastic "worm drive" has sheared

I'm converting my xs400 wheels over to wires with disks, they were fitted to european xs250's and Rd400's (18") and fit straight on. Sr's run an 19" front i think and a 18" rear? if you can get the hubs to fit (i used an SR500 left caliper and mount for dual front disks) then you can get them relaced onto the matching rims. drewpy

the word you want is front brake SHOES!! look on motogrid.com for part numbers

I have some values you could check with an OHM meter... spark plug cap 10kohms pickup coil 700ohms +/- 20% @ 68'F Coil primary resistance 3 ohms +/- 10%@ 68'F secondary resistance 8.6kohms +/- 20% @ 68'f If the sparks are weak, they def won't fire under compression conditions. make sure battery is fully charged. drewpy