I have a 2001 Honda CR125R, and I'm going to have the top end rebuilt. If it needs to be bored, I'm either going to resleeve it or replate it, because it is an aluminum cylinder, I have to replate it or resleeve it. I would like other peoples opinions on resleeving or replating, and which you think is better. I have heard good and bad about both, but I'm still not sure which to go with yet. Any input on this subject is greatly appreciated! Thanks for your time!!
2007-03-04 13:27:33 · 6 answers · asked by Anonymous in Cars & Transportation ➔ Motorcycles
As you have been told, an '01 CR has a nicosil coated cylinder sleeve/liner so boring isn't possible. I don't even like to hone them myself.
If the bike has had reasonable care taken of it, and doesn't have a go-zillion hours on it, chances are you'll just need to do a top end job on it. Nicosil is extremely hard and wear is for the most part non-existent.
Have a machine shop check the bore of your cylinder. When wear occurs it's almost always in the center of the cylinder, making it almost barrel shaped. If yours is worn enough to justify replacing the liner check around on the cost of having it replaced, but while your at it check on the price of a whole new jug as well.
I've found that in some cases on 85's and 125's it's the same price or even a little cheaper to replace the whole cylinder. The cost of a sleeve is minimal, it's the labor involved pressing out the old one, the new one in, and then matching the ports on the liner to the cylinder that gets you. Or at least it has me in several occasions. YMMV.
I've never had any experience with replating, so I can't speak to that at all.
2007-03-04 23:37:27 · answer #1 · answered by Nomad 4 · 0⤊ 0⤋
First step is to determine if the cylinder is damaged. If not damaged, just worn a bit, it may be fitted with a new piston which is slightly larger than stock. These are sold by several wholesale houses I deal with. The cylinder is honed to remove small scratches, etc, and the proper size piston fitted. If the plating is damaged, it may be sleeved or replated, Cost is aproximately the same, both work very well, if done by a reputable shop. Of course, the sleeve may be rebored several sizes. On an old engine, I usually recommend resleeving. Active racing engines, most often require replating, to keep the engine size under the class limit.
If you would like information on the pistons to fit the slightly oversize stock bore, you may E-mail me.
Tomcotexas
tomcotexas@yahoo.com
2007-03-04 22:38:12 · answer #2 · answered by tomcotexas 4 · 1⤊ 0⤋
i think your choice depent what cane of cylinder you have ,i not shure i f you cylinder is made of nikesil or is aluminun ,if is aluminun you choice its sleeved and if is nikesil you choice is replated because they give you garanted if go bad check for california repair shops for motorcycles cylinders .nikesil look like aluminun but is not nikesil cant be sleeved. if you dont want to replated you only choice is get a new one .
2007-03-04 22:25:56 · answer #3 · answered by Juan L 2 · 0⤊ 0⤋
Is the engine blown, or just weak, loosing compression. If so, all you need is new piston and rings, its simple and will only take about two hours. If the garage wants to check your head for wear they are probably just milking your pockets. Rebuild it your self. I used to race 125 semi pro, and I would rebuild my topend once every two months, it is very simple and can be done for around $80-$100 yourself.
Best of Luck!
2007-03-04 21:33:32 · answer #4 · answered by Tweendasheetz 3 · 1⤊ 0⤋
you need to have it replated or a whole new jug
2007-03-05 10:41:07 · answer #5 · answered by Anonymous · 0⤊ 1⤋
What you need for your Honda CR125 is the phone number of a local scrap dealer to take the pile of junk away.
2007-03-04 21:31:16 · answer #6 · answered by Anonymous · 0⤊ 5⤋