Big Bore Kits For Ms660?

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bigjayfromwa

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I know that Baileys offers them for the 440 and 460 but i would really like to get one for my 660. I appreciate any help you guys might have out here.
 
This is an interesting idea. an 066 with the cubes of an 88 would be kickazz. then imagine it ported. I'd love to see a big bore kit for 088s. as if they werent big enough already right?
 
Apologies to Tom Hall for having this thought, much less writing it down. Today I tore down 4 066/MS 660's belonging to one of my biggest commercial users. All 4 saws have badly damaged cylinders. This user is a great customer, they buy MANY saws per year, they use premium (but not Stihl) oil, they really maintain their saws well, and for the most part- don't abuse them. This is a customer that brings in 1-2 dead saws a year. 4 in one week. Wow. I found they had just gotten a load of gasoline from their supplier that was 10% Ethanol, of course it was 87 octane, just like they have always used. I know Stihl has always recommended 89 octane, but it has not seemed to have REALLY mattered- until now. 4 cylinder assemblies, 4 dual port muffler covers, and misc other parts --about $1300.00. There is really a question coming in this post- Are the Bailey's cylinder kits of acceptable quality? They seem too good to be true at $110 per, but I"m sure many of you have used them. The Bailey's pistons are 2mm smaller than the stock 066 if I read the info correctly. Why? I don't want these question to become another "bash Stihl" rant about parts prices. Alot of that is true, but it detracts from the facts. I've got a tough hide and can accept the variety of opinions that exist on this board, but I'd like to hear from a few people who have put the Bailey's cylinders in commercial service. What's their track record. Thanks.
 
I think retail was just a little over $300. I don't have parts price files on this computer, but this is close.
 
Stihldoc said:
Apologies to Tom Hall for having this thought, much less writing it down. Today I tore down 4 066/MS 660's belonging to one of my biggest commercial users. All 4 saws have badly damaged cylinders. This user is a great customer, they buy MANY saws per year, they use premium (but not Stihl) oil, they really maintain their saws well, and for the most part- don't abuse them. This is a customer that brings in 1-2 dead saws a year. 4 in one week. Wow. I found they had just gotten a load of gasoline from their supplier that was 10% Ethanol, of course it was 87 octane, just like they have always used. I know Stihl has always recommended 89 octane, but it has not seemed to have REALLY mattered- until now. 4 cylinder assemblies, 4 dual port muffler covers, and misc other parts --about $1300.00. There is really a question coming in this post- Are the Bailey's cylinder kits of acceptable quality? They seem too good to be true at $110 per, but I"m sure many of you have used them. The Bailey's pistons are 2mm smaller than the stock 066 if I read the info correctly. Why? I don't want these question to become another "bash Stihl" rant about parts prices. Alot of that is true, but it detracts from the facts. I've got a tough hide and can accept the variety of opinions that exist on this board, but I'd like to hear from a few people who have put the Bailey's cylinders in commercial service. What's their track record. Thanks.

Wow thats a big major break down there. I'd be asking alot of questions since it all happened at once. I had a guy bring me a 046 that blew a rod bearing. The very next day he came in with a 066, engine shot. Come to find out they had used the diesel can to mix up their last batch of mix. What they didn't do was take out the last few quarts of diesel left in the can. Since 4 saws went down at once I'd have to say something very specific caused it. I've had no issues with the new gas as of yet. Can't say anything about Baileys Bill, never used anything but Stihl parts. In your case though thats a pile of money for that customer, can't blame you for looking for a better price for a good customer. I'd be giving Don or Kevin a call about those 4 saws though, man thats a biggie break down all at the sametime......
 
the last quote I got from the dealer was $360 per set. I can tell you that the P&C sets coming out of Bailey's hold up very good. I have built well over 2 dozen modified 046 big bores and had only one problem. The circlips in the original kits were soft. Bailey's instantly fixed the problem and I have not seen any other problems with the kits. I know several other builders who are having the same good fortune with them as well.
 
Stihldoc said:
I think retail was just a little over $300. I don't have parts price files on this computer, but this is close.

Thanks!

That would make the pay-off at nearly 366 hours if the 066 big-bore kit would cost $110 ,,,,,,,,,,,, granted the Stihl peice of mind would need to wash out the 066 BB gain? Sort of a toss up,,,,,,,, intill you think that the BB kit might trash the crank with a major migration on parts.

Just a moot .02 cents worth

Kevin
 
There is a seller on Ebay right now selling OE 066 P&C sets for $239, buy it now. He seems to have an endless supply of them. I bought one, put it on, and have milled and cut with it quite a bit.

On the same note, I have a BB 460 kit coming, cant wait to see how it compares to the 066.

I know here in MI, a 460 P&C goes for $295.
 
I've used a few similar Pistons and cylinders of Chinese origin in homeowner saws, and of course they work. The question on all minds is whether they will last as long as the OEM, and, whether quality control is good such that all are the same.

I didn't like the finish inside the ports, the rings were marginal, and the piston castings were poor. The pro's I deal with do not want to save $150-200 today - they want a long lasting "no worry" saw. They'd rather pay the extra and not worry, whether that is reality or not.

A few other differences: the clips - I always use oem... even if they are a PITA to put in. Stihl didn't go away from the curly end 15 years ago just to make it hard for the techs. The piston pins on the aftermarket are just straight ground pins. The OEM (on 036 and above) are taper ground to reduce the weight by about 1/3.

From Bailey's catalog - "We recommend OEM parts on newer saws, especially in the warranty period.... .... They then go on to say that on older saws aftermarket parts make a repair an affordable option. My 066 or 460 isn't "older"... Kind of a mixed message??



I have used a lot of Tecomec cylinders (Italian) over the years and never had a failure.
 
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My dealer out here has recommended 89 octane for years. He says that he gets a fair number of saws that go down with 87 octane fuel. It isn't the octane so much as it is the other junk in it that is hard on all 2-cycles. I don't know if they have a different formula for NY gas or not.
A few years ago all the gas around here was some special oxygenated formula that they were trying. It only lasted a few months because sleds, chainsaws, etc were blowing up. Dad lost a good 028 to the gas that year.
 
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