The Yamaha Road Star Warrior Forum

bigr:

Arizona Warrior:

It seems honing the cylinders for a piston swap would always be a good idea.  It allows the new gapped rings to break-in on a smooth surface.  Ask if that is included and if it is, its worth the hour even if it only takes fifteen minutes.

I don't believe I've noticed new pistons with burrs on them.

I always thought that the cylinders has some kind of special coating like ceramic or something similar that couldn't be honed without destroying the coating. I could be wrong, but I seem to remember reading that something special had to be done when honing the stock cylinders. Anybody know for sure on this??

 YES YOU ARE CORRECT, DO NOT HONE THEM!!! You will destroy your stock cyls by honing off the coating that the factory Yamaha uses.  

Pep:

I'd argue with them about it. Explain that if you knew they were going to charge you for that you would have taken it elsewhere and will reconsider where you have your work done in the future. If they feel that they need to charge you for it, let them know that  on the "rswarrior.com" website every member who's had this done during the recall weren't charged anything addtional and there isn't an addtional hour of work involved.  
If they still insist on charging you I guess you'll need to pay it but I'd also let them know that you will be posting the dealership name on the website noting the charge so others can avoid them. This is BS!

 I would put up this argument when you go to get the bike, if it is a hack shop they may take it upon themselfs to not put the HC pistons in, to just tell you they did, hey you never know, I have seen and heard of some crazy sh*t. Just sayin, I would wait to give them h*ll untill after the job is done. Just my opinion.

 Also ask for your old pistons and stuff back that they take out.

I was definitely going to ask for the old ones when i pick up the bike.

AlanH:

There is additional labor involved to gap the new piston rings if i'm not mistaken

I agree. The tech will have to gap the rings and inspect the pistons. I have not seen the pistons you are having installed, but the tech sounds like he is familiar with them. I think paying the $80 is fair if the tech is going to take the time to do the job right. He is not charging extra for the 5th gear swap just the piston work. If you don't trust the tech have him show you the pistons after the deburring is done before install to confirm the work.

if the tech is deburring the pistons in the dome area and such that is one of the techs you want to do your bike ,he knows that if there are no sharpe edges or corners in the combustion area that it will do several things. one , lower the chance of detonation,  two, it will help the flame front cover the piston easier and more effiecently, if you can ,get him to do the same to the head if there are spots the too, that shows the difference between slap it together ,and take time to do all the details that count ! cya btk572

You make a good point.  The service manual doesn't talk about honing.  It makes me wonder if the 108ci and 110ci kits that have bored-out jugs get a jug lining?  In any event, my bad, you are correct.

Warrior-Dragracing978:

bigr:

Arizona Warrior:

It seems honing the cylinders for a piston swap would always be a good idea.  It allows the new gapped rings to break-in on a smooth surface.  Ask if that is included and if it is, its worth the hour even if it only takes fifteen minutes.

I don't believe I've noticed new pistons with burrs on them.

I always thought that the cylinders has some kind of special coating like ceramic or something similar that couldn't be honed without destroying the coating. I could be wrong, but I seem to remember reading that something special had to be done when honing the stock cylinders. Anybody know for sure on this??

 

 

 YES YOU ARE CORRECT, DO NOT HONE THEM!!! You will destroy your stock cyls by honing off the coating that the factory Yamaha uses.  

 Yes the 108, 110, and the 119 kits get bored and a linning is then installed which would require honning. These are cast iron sleeves that are used.

Arizona Warrior:

You make a good point.  The service manual doesn't talk about honing.  It makes me wonder if the 108ci and 110ci kits that have bored-out jugs get a jug lining?  In any event, my bad, you are correct.

Yes OE bores the cylinders and they recoat with the nikasil coating. You loose the black paint on the  outside of your cylinders during the process though, so you will have to have a plan to get them back the same color as the rest of the motor.

PR just bores out the cylinders and press fits cast iron sleeves. Your paint doesn't get damaged during this process.