I wondering if anyone had a rough estimation on a .010 oversize bore for a stock cylinder. I can't find anything online. :-/
My local Napa auto parts store is part of a small chain (7 jobber outlets owned by one guy) that has a machine shop locally in the basement of one of their stores. They charge $45 for the bore and $3 "hazmat" fee for chemical disposal. Either way, the total out the door is $48 for a 2 stroke engine.
The only problem with mail ordering something like a bore job (not against Ken or any other engine builder) is that unless you are completely stuck and have NO other other choice, that bore is going to end up costing you $75+ due to shipping charges (which Ken has nothing to do with!)
I recommend fanning out to machine shops locally before calling someone far away to bore a cylinder but always remember Caveat Emptor! Get references for their work and make SURE you talk to someone who's actually going to be working on your cylinder. If they sound confused, walk away. They need to know what they're doing BEFORE they hack your cylinder up!
Most shops will not chamfer ports on a bore job in my experiance.
I'll probably just have him do my entire top end if I drive down there.
I had a cylinder bored several months ago at a local bike shop, which has a great reputation for building race winning bikes. It's for a CR250 that I still haven;t put back together yet. Today I was looking at the cylinder and noticed the ports were not chaffered, port edges are sharp as a knife. I'll be the first to admit that I'm not an engine guy and I had never heard of chaffering the ports before I read about it here in the last few weeks. I don't know how important it is or if it's a Blaster thing. Before I realized today that the ports weren't chaffered, I had been considering sending my stuff to one of 3 engine builders I've come to know here (I haven't decided which one of the 3) but now I'm sure I want to send it off. On a side note, I did talk to the local builder about doing me a Blaster engine and he's talking cylinder pressures of 230-250 PSI. After reading some stuff here, that seems way to high. What civicsidude said is true, It's going to cost me more than twice to send it off than having it done locally (about $80 instead of $35) but I'll gladly pay the extra for the piece of mind that comes with paying someone who knows the specific engine being worked on. I'm sure there are local shops that will do it right and at a good price but there doesn't seem to be one "local" to me. the first mention I had ever heard of port chaffering was one of the members said in a post "if they don't know about port chaffering, walk away" (maybe not a word for word quote). Since then, I've saw it talked about several times. I makes sense but if I had not read about it here, I would have never questioned the work from the other shop.
I had a cylinder bored several months ago at a local bike shop, which has a great reputation for building race winning bikes. It's for a CR250 that I still haven;t put back together yet. Today I was looking at the cylinder and noticed the ports were not chaffered, port edges are sharp as a knife. I'll be the first to admit that I'm not an engine guy and I had never heard of chaffering the ports before I read about it here in the last few weeks. I don't know how important it is or if it's a Blaster thing. Before I realized today that the ports weren't chaffered, I had been considering sending my stuff to one of 3 engine builders I've come to know here (I haven't decided which one of the 3) but now I'm sure I want to send it off. On a side note, I did talk to the local builder about doing me a Blaster engine and he's talking cylinder pressures of 230-250 PSI. After reading some stuff here, that seems way to high. What civicsidude said is true, It's going to cost me more than twice to send it off than having it done locally (about $80 instead of $35) but I'll gladly pay the extra for the piece of mind that comes with paying someone who knows the specific engine being worked on. I'm sure there are local shops that will do it right and at a good price but there doesn't seem to be one "local" to me. the first mention I had ever heard of port chaffering was one of the members said in a post "if they don't know about port chaffering, walk away" (maybe not a word for word quote). Since then, I've saw it talked about several times. I makes sense but if I had not read about it here, I would have never questioned the work from the other shop.