Good evening to all of you !

I'm new in here as I recently bought a XV 1000 SE with a blown motor.
So, I've got a few questions for you. I searched for some answers but couldn't find what I was looking for, sorry  

My motor is a 23W model and the intake valve from the front head broke and made a big hole in the piston. The result of this is a broken piston and a broken head (the cylinder and the crank seem to be OK).

Now I need to rebuild it and am looking for different possibilities as it's really difficult to find parts for these 23W motors.

First option :
I've got an opportunity on a complete 1992 XV 1100 motor (the serial number looks to start with something like "OLV" but can't find anything related to this...). As I don't want to change the entire motor, my plan will be to use the crankshaft / cylinders / pistons from this motor.
Could you confirm me that they'll fit ? If I understood what I saw in this forum, it will fit without boring the cases or things like that ?!

Second option :
I found a XV 1000 top end but don't know its condition. As I want to rebuild a nice engine, I'll just use the head and put some new pistons ... But here comes the problem : Can I use pistons (and possibly cylinders) from later XV 1000 as the ones designed for the 23W motor are discontinued   ? Do you think that it's a great idea to use my old cylinders with new pistons ? My bike is about 75k kms ...


Many thanks for your answers !
Arthur

Hi Greg,

for TR1 or XV1000 Pistons look here: https://www.tr1.de/cgi-bin/yabb2/YaBB.pl?num=1549803644  

cu
Dieter

Hi Arthur,

when using new pistons, we usually bore the cylinders to the next oversize. In used cylinders, the surface is usually no longer in good condition.
We would also advise you to use the cylinders of the newer XV 1000 or XV 1100, because then you can use the flat cylinder head gaskets from the newer generation.

Or you are using the complete XV 1100 rotating assembly include cylinders and pistons, which is easily possible, as Greg has already described.

Best regards,
Dieter

Hi Arthur,

get the bearing shells and some plastigauge and measure the clearances. If it's too wide, you'll have to order another (tighter) set of shells, if not you're lucky. Last time I was unsure Sepp basically said: get the black ones regardless, as the fitment is usually a lot sloppier than what Yamaha recommends.

Cheers,
Greg

Hi Arthur,

the plastic sleeves are never offered separately. Only the complete studs include the sleeves are available. Part No. 4X7-11363-01.
But you can replace them with heat shrinking tube, I had done it in the past too.

Because the rod bearings: I always use the black or blue ones, because the bearing clearance in original is to big, so you loose oil pressure.
In all machines I've build over the years this was a good solution.

Cu
Dieter