Cho90

[Chainsaw Jim]

@farley9n's chinese 090

 

[Chainsaw Jim]

It ran pretty good with a huge squish band at .080

Now with the base cut to get the squish down to .019, plus the addition of an HL360 race carb set up for methanol. It's running pretty rich so it won't hit high revs. It sounds like the pipe needs a little tuning too.

 

[Wood Chopper]

Second vid link isn’t working at least for me Jim


Sent from my iPhone using Tapatalk

 

[EJ mcnamara]

Hay Jim ever think of putting a different ignition in it like a pvl it helps a ton the only thing it eliminates the fly wheel but the alky will keep it cool nice saw thou I Like it

 

[Chainsaw Jim]

 

[Fruecrue]

Looks faster Jim, still more to come?

 

[Chainsaw Jim]

Looks faster Jim, still more to come?

I'm assuming so based on the conservative numbers I started with. There's a few other things that will need done. I would really like to modify an 1122 poly flywheel and coil to fit. Another thing would be a full circle crank.

 

[sawracr]

 

[sawracr]

Working on one myself, got a long way to go, need lot of parts, going to use a hr Tilley carb.

 

[Chainsaw Jim]

View attachment 158683

Is that an 070 cylinder?

 

[sawracr]

Nows when I should say it's a 10 cu cylinder , but I can't the cylinder has been welded and the the transfers were dropped out (it's 66mm) Ran it a couple times Years ago, going to pipe it this time, just waiting on Chinese parts and other parts.

 

[EJ mcnamara]

I got the wiseco 70mm piston that really help

 

[Chainsaw Jim]

Nows when I should say it's a 10 cu cylinder , but I can't the cylinder has been welded and the the transfers were dropped out (it's 66mm) Ran it a couple times Years ago, going to pipe it this time, just waiting on Chinese parts and other parts.

The 66mm one I'm working on has no transfer bulges out the bottom like yours. I wish this thing was mine so I could get crazy with it. Maybe one of these days I'll get my hands on a REAL one.

 

[RI Chevy]

Nice job Jim.

 

[Deets066]

The 66mm one I'm working on has no transfer bulges out the bottom like yours. I wish this thing was mine so I could get crazy with it. Maybe one of these days I'll get my hands on a REAL one.

I bought a spare oem 090 jug off the bay for $30. Had a tap broke off in the exhaust bolt hole. Pretty good shape other than that.

 

[Deets066]

 

[Chainsaw Jim]

Plugging that decomp hole is equivalent to cutting .021" off the base if my math is right. 4mm x 9mm

 

[Deets066]

Plugging that decomp hole is equivalent to cutting .021" off the base if my math is right. 4mm x 9mm
View attachment 158835

I don’t believe any of that is gunna be there in the end.

 

[Fruecrue]

I don’t believe any of that is gunna be there in the end.

Are you saying two piece head?

 

[Chainsaw Jim]

I don’t believe any of that is gunna be there in the end.