Big Bore 660

[elfinwood saws]

Hi has anyone tried one of the 56mm bigbore kits they give 98.5cc. I had a rumage about in a box of stihl bits i bought and found a ms660 and 3 064,s among other stuff, the 660 needs a barrel and piston so i thought stick a bigbore on it and open the exhaust a bit, should be quite a tool, if you have tried one of these kits did you have any problem?

[Cut4fun]

WhatI thought about the latest generation of NWP BB 066 is in this thread. Link http://arbtalk.co.uk/forum/chainsaws/26792-genuine-non-genuine.html

[elfinwood saws]

WhatI thought about the latest generation of NWP BB 066 is in this thread. Link http://arbtalk.co.uk/forum/chainsaws/26792-genuine-non-genuine.html

yes that,s the kit i was thinking of from Baileys might buy 2 got an 064 needs a pot and piston.

[Cut4fun]

You realize it just isn't a bolt on deal putting on the 064 right?

[landyman]

what needs modding on the 064 to make it fit. used to be an engineer so not a problem doing it if needs be.

[agg221]

Not tried it, but I have an early spec 066 Magnum (US import) from the time when adding the word 'Magnum' meant something. I believe at that time there were two different crankshafts, the one in the Magnum was described in the parts list as 'heavy duty'. Just a thought - no idea whether Stihl went for this as standard later on or for the normal one, but if they felt the need for an uprated crank then it may indicate concerns over up-rating the normal one. I think the Magnum was an extra 0.5hp or so, mostly achieved through a factory-fit dual port muffler.

 

Alec