254/346 Hybrid Build “documentation” thread thingy… idk

[ZukiRyder440]

Alrighty fellers its been a little while and I figured I’d try and do a build/ documentation and or a proof of concept thread if you will.

And I know.. whats the point of this build? To scratch an itch I guess I dunno haha. Kidding,
my wheels got turning about a few things. I thought to my self, “I like the simplicity and feel of the 254 and combine that with a modernized transfer design AND a longer stroke” the 346oe+ne /350/353 being 32mm and the 254/257/261/262s have a 34mm stroke.
And with the 254 having a shorter rod, it made things waayy easier. Well, easier enough so I could mock things up and get a reasonable squish with out drastic work.

Maybe the longer stroke will make it run like a bat outta hell, maybe not. We’ll see.
Alrighty Enough jib jabberin lets get to the pics

 

[ZukiRyder440]

The intake side cylinder mount holes weren’t too far off, the exhaust side was a different story but it was manageable. Was still brainstorming at this point

 

[ZukiRyder440]

Skip what seems like a decade worth of back and forth tweaking on the holes, we got er on the case. That area you see squared/marked was where the carb was sitting. These were are reaallly nice cases so I didnt want to hack em up, again, I was still planning things out at this point in time and didnt want to impulsively so stupid things

 

[ZukiRyder440]

Some random loose assembly pics to see how everything fits..

 

[ZukiRyder440]

I ground the FW cap until nothing was dragging/ catching. Looks like Ill be able to use the stock throttle rod too. I was using a junk 199 for mocking up, it was just about the same physical size as the original 120.
Everything is seeming to fit rather nicely too

 

[ZukiRyder440]

Got a junker set of cases and ground down that little ledge to get the cylinder to sit flat. I hardly got onto the actual gasket mating surfaces on the cases

 

[ZukiRyder440]

Matched the transfers to the “new” cases.. still plenty of meat for the gasket(s) to seal. The pic with the 2 sides together looks wonky but they are dead even.

 

[ZukiRyder440]

I ended up using the 357/59 intake boot along with the stock 254 filter holder, carb, throttle rod etc. everything moves like it would with the 254 top on it. The mount hole for the filter holder lines up with the bosses in the cases which is a huge plus. I didn't want that boot floppin’ about

 

[ZukiRyder440]

Filter + Muffkin on getting closer to victory

 

[ZukiRyder440]

Tuning screws line up pretty close to with the 357 intake partition guide thing-ama-jigger.

 

[ZukiRyder440]

Top cover on and ready for some test cuts. Can hardly tell that its got any sort of fookery goin on with it.

 

[ZukiRyder440]

Until you see the muffler snd go “Wtf??” Bahaha

 

[ZukiRyder440]

First cuts with the 353 topper… no e too impressive. Super fat, verry very punchy

 

[ZukiRyder440]

Alrighty that’ll do it for the night… ill gove more updates tomorrow

 

[David Young]

Wow great work

 

[PA Dan]

Nice work buddy! How many brain cells were fried during this build? Glad to see someone thinking that much into all the workings of a two stroke!

 

[ZukiRyder440]

Wow great work

Thank you David, its turned out to be more than manageable even though most of everything so far has been tedious. But its for science! Haha

 

[ZukiRyder440]

Thank

Nice work buddy! How many brain cells were fried during this build? Glad to see someone thinking that much into all the workings of a two stroke!

ya Dan! Alot of them were fried… bahaha. Just constant back and forth getting everything to fit right was just ridiculous but worth it. After getting the jug on, everything kinda fell together after that point.

 

[ZukiRyder440]

Ill get more pics tonight, I ended up going with a 45mm 346 cylinder instead of the 353.

 

[ZukiRyder440]

The 346 cylinder was pretty straight forward and less dinking around, mainly because I already knew how the holes needed to be spaced(thanks to my stock 254 base gasket)