some modded xs400's

drewpy

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just been trailing my pictures on the pc and uploaded a few pictures of the vaious xs400's I have collected over the last 5 yeras. I got more somewhere.....

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450cc conversion
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You've got my attention with that 450cc conversion, Drew. Any more info on that? Looks like new pistons/rings, cam and a bore job? Are the pistons from a different bike, or aftermarket?

Planning on opening up the top end this winter to fix a leaky gasket, so I mind as well consider a big bore kit!
 
I saw it on german ebay a couple of years ago and nicked the pictures before they went forever.
new Yoshimura sleeves drawn in, new high-compression Yoshimura pistons with 73 mm bore = capacity 440 ccm
- cylinder head: completely revised with shortened valve stems, gasflowed, new valves (inlet 36 mm, exhaust opening 30 mm)

supposed to make 50hp

that's all I know
 
Wow!

It does seem like a little more work than I'm willing to do at the moment. And Yoshi pistons might be a little out of my price range... Sounds like fun though!
 
936ce6ac.jpg

off the german xs400.de site

its done in HDR a composite of 3 different exposures which pick out certin hues and tones. then its all put together to make an interesting photograph
 
aye it is, I first saw it in classic motorcycle magazine for the north weald classic bike festival in the south of England 2nd sept 2007. Unfortunatly I have unable to track the owner (Paul Shivers) or his bike since, shame really!!
 
found another pikkie of the Milvin xs400
b06.jpg


what he said
I purchased this 1982 XS400 Yamaha a few months ago in good running condition, and have spent some time modifying in order to fit my personal preferences. Following is a brief description of the work that was done.

CHASSIS: I stripped the frame and removed the rear frame loop, along with some extraneous tabs, then bent a new loop from steel tube. The major change to the bike was the conversion to a monoshock arrangement; a machinist friend of mine milled a length of 4.5" OD steel tube to my specs, which I then welded to the bottom of the frame. The single shock is a low mileage unit from an FZ6, and is set up to work in compression, as is normal. The rear end of the shock pivots, and the front end is allowed to slide along a set of milled slots, courtesy of a pair of adjustable thick-walled "rods". Adjusting the length of those rods allows rear ride height to be altered. Ground clearance has been increased, again just a personal preference, and the sidestand lengthened. The ride is very firm at this time. A different shock or spring rate could be employed for a softer ride.
 
aye it is, I first saw it in classic motorcycle magazine for the north weald classic bike festival in the south of England 2nd sept 2007. Unfortunatly I have unable to track the owner (Paul Shivers) or his bike since, shame really!!

there's a bloke who runs a bike shop in Lowestoft who, only today mentioned that very bike. I have the phone number off a guy on brit chop. I'll let you all know how I go on
 
there's a bloke who runs a bike shop in Lowestoft who, only today mentioned that very bike. I have the phone number off a guy on brit chop. I'll let you all know how I go on

nice one surp. passing stafford today onto Telford to pick a guitar up!

you attend the classic bike show there?
 
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