Saw builders chime in.

[jacktheripper]

I’d like to try to modify an 036 to run a max flow filter. I think I would have to add longer carb studs to the carb box, modify an 044 air filter base plate to mount onto the carb box/carb, and use the 044 filter horn to mount an open max flow filter.

 

[Sloughfoot]

036 have an integrated choke, too?

 

[jacktheripper]

036 have an integrated choke, too?

Luckily it doesn’t

 

[Stump Shot]

If quads are so much better why are many modern units duals?

Piston diameter is the one thing I notice; 5 series compared to three series pistons of the same cc output are smaller, therefor easier for the "action" of the uppers to perform.

 

[sawmikaze]

I’ve never run a 242, but I would bet pretty good money that a ported 543 will hold its own against a ported 242

Am I ever gonna get any royalties for starting the 543 love ? I tried to tell people they were good little units after being ported. Too bad the fuel and oil caps suck and the air filter leaves a little to be desired.

 

[Sloughfoot]

Shaving the choke down is also beneficial as is bumping the timing up.
Even after adding a winter filter, deleting the base gasket,shaving the choke, muffler mod, timing advance and a Walbro WT-194 carb you still have something that slower than a bone stock 346 and that coat significantly more money.
All this applies to a 260 Pro. Never fooled with the 026.
Also you can add 044 antivibe mounts. They last longer and are stiffer.

Good point. You're talking about a different saw. In any case, what power gains do you expect to get with those minor modifications that you wouldn"t get with any other saw?

 

[lehman live edge slab]

Truth. After porting my 026 it can't get enough air through a stock filter to even begin to accelerate and won't choke well enough to cold start.

I may have overdone it.

Flocked or winter mesh? If they’re pulling hard and choke spring is weak they will suck choke shut.

 

[lehman live edge slab]

Good point. You're talking about a different saw. In any case, what power gains do you expect to get with those minor modifications that you wouldn"t get with any other saw?

260 not much difference over the 026 some are basically identical and others have 44.7 mm bore vs 44 after the epa regulations change just like the 346 changed slightly. So for all intensive purposes the 026/260 run nearly identical and are of same design.

 

[Ketchup]

Good point. You're talking about a different saw. In any case, what power gains do you expect to get with those minor modifications that you wouldn"t get with any other saw?

In the case of 026/260, the intake is highly restrictive. Lots of other saws have a better intake so fooling with the details gains less. On 26 it’s a major obstacle.

IIRC (I might not), when you flatten the piston and cut the band it drops the intake quite a bit. Epoxy isn’t the end of the world, but I prefer to avoid it.

 

[2000ssm6]

Go ahead and shut this one down, I present peak 50cc greatness.

 

[lehman live edge slab]

Go ahead and shut this one down, I present peak 50cc greatness.
View attachment 474480

Great saw except I’d want one without screws personally

 

[2000ssm6]

Great saw except I’d want one without screws personally

Until I’m forced into mtron/fi, only screw saws here. I figure when the 261 gen 3 comes out, won’t be able to get a standard carb.

 

[lehman live edge slab]

Until I’m forced into mtron/fi, only screw saws here. I figure when the 261 gen 3 comes out, won’t be able to get a standard carb.

261’s old will be an all new saw coming soon. Scott likes the mtronic himself better also from a performance standpoint anyway. From what he tells me the mtronics seem to edge out the standard ones. I see both sides but personally like the mtronics especially from the repair side nobody fiddling with carb after saws picked up and trying to blame you or saying it doesn’t run well because you fixed during the summer and they’re now just trying it out in January

 

[2000ssm6]

I see both sides also but I’m after dead nutz reliability.

 

[59billy]

especially from the repair side nobody fiddling with carb after saws picked up and trying to blame you or saying it doesn’t run well because you fixed during the summer and they’re now just trying it out in January

And the other kind...

On another forum, a guy was having trouble with a new saw. When i mentioned adjusting the carb, he threw a tantrum because don't I know they're adjusted at the factory?

Okay, mate, and good luck.

 

[bwalker]

Good point. You're talking about a different saw. In any case, what power gains do you expect to get with those minor modifications that you wouldn"t get with any other saw?

Honestly not enough for the time and money you spend. Messing around with a 260 is throwing good money at bad.

 

[bwalker]

And the other kind...

On another forum, a guy was having trouble with a new saw. When i mentioned adjusting the carb, he threw a tantrum because don't I know they're adjusted at the factory?

Okay, mate, and good luck.

The average guy cant tune a carb to save his life.

 

[59billy]

The average guy cant tune a carb to save his life.

If everybody mastered carb tuning and chain sharpening, the parts and repair industries would be in serious trouble.

 

[Sloughfoot]

In the case of 026/260, the intake is highly restrictive. Lots of other saws have a better intake so fooling with the details gains less. On 26 it’s a major obstacle.

IIRC (I might not), when you flatten the piston and cut the band it drops the intake quite a bit. Epoxy isn’t the end of the world, but I prefer to avoid it.

Cutting base drops intake to the high 70s and exhaust to low 100s where many saws run the best at. Gotta cut it a lot though. What it doesn't correct is the low 30s of blowdown. I'd say the stock high exhaust roof and large blowdown are the biggest holdbacks, not intake . I've done very little to intake other than drop it to 78 and straighten the sides and it's allowing enough fuel to 4 stroke in the high teens. Also exhaust is widened to the max and curves are straightened out in the lower transfers .

 

[farminkarman]

Before parts became unavailable for the 346 chassis, I built quite a few hybrids on 345's & 350's with OEM 44.3mm top ends. If parts hadn't dried up for that chassis, it would still be my favorite to recommend for the 50cc class. I have ported a few 550 mkII's and they can be made as strong or stronger than the 346, but I always wonder about longevity of the 5-series. For current production 50cc fare, I would go with the Echo 501p or ms261...the 501 almost has to be ported to be tolerated whereas the 261 can be run as-is or ported.