Brewz Saw Builds

[Brewz]

But an 084 has a 43mm stroke vs the 090's 40mm.

I would have thought that would mean the 090 piston would now travel 43 mm up and down compared to the 40mm it would travel on the 090 case

Have I got this all twisted up in my head?

 

[Brewz]

Oh, and once I opened up the side port on the 024 muffler, it now runs up to 15200 4 stroking strong.

That's about as far as I am game to push the Hyway piston, even though it was 10% lighter than the OEM

 

[drf256]

But an 084 has a 43mm stroke vs the 090's 40mm.

I would have thought that would mean the 090 piston would now travel 43 mm up and down compared to the 40mm it would travel on the 090 case

Have I got this all twisted up in my head?

Sounds right to me.

You should need .060 out of the 090 chamber (less squish) to make it work. Hopefully the 090 had a really loose squish so you can pull less out.

 

[Brewz]

Sounds right to me.

You should need .060 out of the 090 chamber (less squish) to make it work. Hopefully the 090 had a really loose squish so you can pull less out.

Will probably start out with a farmertech top end to see if I can get the concept to run good
If I take that much out I will also have to watch the death ring.

It will be interesting to see where the timing ends up.

Do you think a stock HT1 carb off an 084 will supply enough air and fuel or would there be a better option?

 

[Iron.and.bark]

What is the wrist pin size off the 090 vs 084? Should also need to relieve the crankcase to accommodate larger piston aswell.

 

[Brewz]

Not sure at this stage.
Its just a thought but it would be cool to make it happen.
Another issue is the 090 cylinder has a "husky" lip on the base but I guess that could be removed

 

[Brewz]

084 wrist pin bearing: Needle cage 13 x17x17.5
090 wrist pin bearing: Needle cage 15x19x19,5

That could be an issue

 

[mdavlee]

You may need that protrusion to save skirt wear.

 

[Brewz]

I'm probably dreaming here aren't I

 

[mdavlee]

Brett did it on a 088 case

 

[peter92]

I'm probably dreaming here aren't I

any thing is possible , just have to know how to do it , isnt that the fun of it
Need to know first , will the piston fit in safely and what to do to fix it

 

[Postrip]

But an 084 has a 43mm stroke vs the 090's 40mm.

I would have thought that would mean the 090 piston would now travel 43 mm up and down compared to the 40mm it would travel on the 090 case

Have I got this all twisted up in my head?

That is correct!, I thought you meant that putting the 66mm piston/cylinder on the 084, was going to change the length of its stroke which is false
There has been a few race guys done similar conversions on a 3120xp here in Oz, but has not been an outstanding success in the racing scene.

 

[spencerpaving]

I used a 66mm wiesco race piston..used a 088 wrist pin....but they are pricy. ...had to epoxy the outside of the cases a little too..
I left the ring on bottom of the cyl...hindsight I should have removed it on just the sides

 

[Brewz]

I used a 66mm wiesco race piston..used a 088 wrist pin....but they are pricy. ...had to epoxy the outside of the cases a little too..
I left the ring on bottom of the cyl...hindsight I should have removed it on just the sides

Ahh, take the ring off where the piston windows are, yes!

The big question is, how did it go?

 

[Brewz]

Wire mesh filter fitted to the 024
She don't pull the choke flap shut now

 

[spencerpaving]

Ahh, take the ring off where the piston windows are, yes!

The big question is, how did it go?

It went pretty damn well..good enough I'm gonna try it again in the future

 

[Brewz]

What sort of rpm did you have it running at?

 

[spencerpaving]

this is all that's left..

Sent from my SCH-I545 using Tapatalk

 

[Brewz]

this is all that's left..

Sent from my SCH-I545 using Tapatalk

I have some duct tape and a few cable ties.
We could try and fix it

 

[peter92]

this is all that's left..

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Theres only one word for that , and the noise would have scared the crappers out of you