advice for a noobie chainsaw user

[chrismechanic]

yes, i would say it's a bit of ring or spark plug has made those marks.

the damage could be removed on the mill using the rotary table to spin the head around, just on that flat face inside the combustion chamber.

 

that would lower the compression ratio too by a small amount, but tbh you dont want to lower it by much or you'll end up with a poorly running bike .

 

so when you say angle are we talking the dished part that leads up to the spark plug hole, apart from that part of the head the rest looks flat from the pic.

 

you could have a shim made to fit inbetween the cylinder and the head, that would also work and if it lowered the compression too much could easily be removed.

 

here is a very small 2 stroke head i did some external work on... the guy just wanted the outside cleaning up after crash damage

 

before..

 

and after

 

chris

[Eddy_t]

Ally billet arrived, cheers Chris! What's the postage cost?

 

 

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[chrismechanic]

Ally billet arrived, cheers Chris! What's the postage cost?

 

 

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ahh its ok mate, it was just a few pounds, forget it.

you helped me, so consider it me helping you

thanks..

chris

[Eddy_t]

ahh its ok mate, it was just a few pounds, forget it.

you helped me, so consider it me helping you

thanks..

chris

 

Cheers bud, will get pics up once it's made

 

 

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[chrismechanic]

Cheers bud, will get pics up once it's made

 

 

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cool, ill look forward to that..

chris

[Eddy_t]

Almost forgot! I have pictures of the bar!

The 2nd pic is the smaller bar on top to get the bar pattern

11090009276 is the stihl part number

 

 

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[chrismechanic]

ahh so he holes are basicaly reversed...thats a shame..

[Stubby]

yes, i would say it's a bit of ring or spark plug has made those marks.

the damage could be removed on the mill using the rotary table to spin the head around, just on that flat face inside the combustion chamber.

 

that would lower the compression ratio too by a small amount, but tbh you dont want to lower it by much or you'll end up with a poorly running bike .

 

so when you say angle are we talking the dished part that leads up to the spark plug hole, apart from that part of the head the rest looks flat from the pic.

 

you could have a shim made to fit inbetween the cylinder and the head, that would also work and if it lowered the compression too much could easily be removed.

 

here is a very small 2 stroke head i did some external work on... the guy just wanted the outside cleaning up after crash damage

 

before..

[ATTACH]139923[/ATTACH]

 

and after

[ATTACH]139924[/ATTACH]

 

chris

 

This thread should be re titled the engineering / tool room thread ! Rotary table takes me back ! Last time I did anything like that it was ( Label 1 Circle centers X 0.00 Y 0.00 circular polar radius what ever, z minus abit M03 incremental , circular polar 360 degrees ) call label 1 REP 2 . M25 Stop .....

[chrismechanic]

This thread should be re titled the engineering / tool room thread !

 

ya, i totally agree or a projects thread, we can make the first bmw 6cylinder chainsaw haha

Edited November 7, 2013 by chrismechanic

[wyk]

[ame=http://www.youtube.com/watch?v=KfWbXkIyOMo]The chainsaw guy shop talk Stihl 090 G Chainsaw Vintage - YouTube[/ame]