FACTORY BIG BORE!!! 51.4 XPW Jonsered 2166 Swap!

[@richardflagg3084]

I had a 372 with a 51.4mm on the bench yesterday. Turned out to be a complete basket case. They made some 375xp's back in the day but you're correct this was the K375 cut-off saw cylinder.

[@jarrodskeete52]

Ye man I watched your vid this am with the stress u had with that thing! One thing after the next!

[@richardflagg3084]

@@jarrodskeete52Part 2 when I get the fresh parts in should go a lot smoother. Lol!

[@charlied4001]

Last year I was gifted a mint condition 2166 turbo. I already own a 572xp so I didn't need it but I don't mind running it one bit.

[@donjohnson9170]

It’s my favorite chain are Jonsered. I got 4 of the 670. 2 930. 2 of 625 4 of 535

[@larrywarner9314]

There are pistons available there a wiesco piston and there around $180 , I have several of those 51.4 cylinders on my jonsered and Husqvarna saws and they do make a difference that the 50mm bore

[@brettblack7049]

Nice job, that surr soumds good. Sold my modded 51.4 cylinder 372 when I started the barn build, haven't missed it at all. A 268 pop-up in a standard 50mm bore runs just as strong or stronger and it's much easier to start. Surprised you haven't done one yet, let me know and ill send you a couple of piston and a couple saws for comparison 😃.

[@dubbssawshop]

I've had a few 51.4mm saws and I love the torque they have even stock. Seem to mod up really nice 👍🏻

[@Houseworksaws]

I still have 2 nos 51.4 kits and a piston on the shelf.. maybe someday I’ll use them lol 😆

[@brettblack7049]

Just cut a 1mm pop-up on a 268 piston and clean up the ports on a 50mm cylinder and it will outrun the 51.4 all day long, and you'll love how easy it is to pull over.

[@padan3729]

Awesome video Joe! Thanks for showing what the 51.4 could do. Damn that's a pretty saw!

[@brettblack7049]

@padan3729 I fixed it lol.

[@Houseworksaws]

@@brettblack7049 I have a 2071 setup that exact way. Just a popup and minimal port work. Saw runs awesome.

[@brettblack7049]

@@Houseworksaws That's awesome, the last one I did was on a 2171. I robbed the ported cylinder off it to put on a 372xpg, unfortunately I sold that one a couple falls ago, but the money went into building my new pole barn, so that's cool.

[@johnclarke8180]

Love this episode! Appreciate your knowledge and ability to share it with others. Love the work being done!

[@larrywarner9314]

Little Red Barn makes the 51.4 piston kits also

[@bennyblanko3]

Call me a weirdo ... but, I think that is about the last saw I would ever need. I have a red 2071 that is stock and a nice, and a 2260 and both are my goto saws that always rip, every year, if you got to get er done. I love that 2066 with the ported big bore. They just feel good cutting and eat. Pretty light too. Thanks for sharing.

[@ragercrepair9301]

I've only had 1 372, but it was modified. The guy that did it had passed on so I didn't get the full story on what he did. They thing loved the 10k area and cut like an animal! I bet the big bore torque makes a huge difference. Good work on that one! Runs great. I would like to see test cuts!

[@billyboy861]

I unfortunately don't have a 372ex but I do run an 8 tooth sprocket on my 6104 dolmar with a 28" bar and an 84cc cylinder and it is matched about perfect

[@robertdixon4554]

Bet that bigger carb U mentioned near start of VID would let it stretch out a bit with no losses down low ! I know your thinking it .

[@Maniacalchopshop]

I wish they still made them, only cylinder I have for one the plating is smoked.

[@jensenwilliam5434]

Thank y

[@z1berzerker]

My dream saw as a kid 😊

[@FreedomotorsportsLlc]

I got a brand new 51.4 mm top end and as an extra a wiseco piston from Dave. The piston went from $190 to $250 since I bought it

[@230e4]

That is a nice looking Jonsered. It would be nice if Husqvarna would start selling the 51.4 mm cylinder kits and piston kits again. The demand for a 372 big bore is alot greater now than when the 375 was produced, they would be a good seller once the word got out and if the price point was good for those wanting a better option over aftermarket big bore cylinders. As it stands they are very hard to find now and $$$$. I still think the OE 372 50mm or 51.4mm cylinder kit is the best mod one can make to a 372xp x-torque.

[@230e4]

A dyno comparison of 372 OE, 372 x-torque, and 390 between OEM carburetors on a ported OEM 372xp 50mm cylinder would be interesting.

[@phogelbice]

got a 365 special with a xpw top end, quick port job and 3/8-7 sprocket, 28" bar. ✌ Should be possible to turn down a 52mm piston to 51.4? And perhaps deepen the ring grooves.

[@Bg1111ghk]

I believe Baileys sold a 375xp for a short time with a 51.4. I also believe there was 372xpw 51.4. Dudes also used the 375k cylinders

[@chrismuncey3861]

I'm doing the 372xt carb and 390 boot upgrade on my g372 for more flow. Then I'm going to try to send it your way and see what kind of HP it's putting down. I've never tried an 8 pin on my 372 I'm going to eventually. With the rpm in the cut holding around 12.5k now it doesn't seem to need it.

[@Houseworksaws]

Instead of an XT carb (RWJ4) find a 385/390 carb Walbro WJ-116 or Tillotson 296a they are better performers and hold a tune better. The RWJ4 has a divider in it for the XT and makes the Venturi have a weak signal.

[@chrismuncey3861]

@Houseworksaws The 372xt carb has a 19.05mm venturi. 385 390 is 17.5mm. This 372 Is heavily ported and mechined. 227psi compression 15k free spinning and holding 12 to 12.5k in the cut. I believe I've reached the limit of what the stock carb and intake boot can flow.

[@Houseworksaws]

@@chrismuncey3861 Larger overall Venturi in the RWJ4 but it’s got divider in it. One side has the nozzle and is the Venturi and the other half is just for fresh air. As what’s required when that carb is in the strato saw it was designed for. When that carb is used in a non strato saw it has a weak signal and doesn’t perform very well. The Venturi may be smaller on the 390xp carb but far out performs the rwj4. Study the RWJ and you’ll see only half of the 19.05mm is a true Venturi.

[@chrismuncey3861]

@Houseworksaws Interesting I wonder if the divider can be mechined out?. I'm just trying to get more air flow on this bad boy without doing a custom intake carb

[@Houseworksaws]

@@chrismuncey3861 The divider is plastic and can easily be popped out by breaking it and then taking it out in a couple pieces. You could always have a 385/390 carb bored a 1 or 2mm. The 395xp carb (Tillotson 298a) also fits into a 372xp without a ton of work. Sometimes it’s not about Venturi size and the proof is in the fact these carbs are able to feed 90+cc saws whether stock or ported. It’s more of how the carb is designed. There’s a lot of technology that goes into Venturi shape and design also into the fuel circuits in said carbs. There are many great options for a 372. I have the 395 carb on my machined and ported Jonsered 2165 (Husq 365sp). It works very well. Anyways have a look around I bet you can find one used for a fair price and I believe new they’re 98$

[@Leave_Nothing_Stock]

I run 8s on just about everything. Just like anything else, if its what youre used to, everything else feels a little off

[@justinweaver8107]

I to run 8s not had much trouble.

[@ericwatters1617]

I run both 7 or 8 tooth just depending on the wood I am running in

[@Woodman_Custom_Sawing]

That's a looker, wish I had one.

[@Sephro]

Technically on my second 2166, first was stolen out of my shed and was able to get a replacement referb off ebay right after they stopped making them.

[@walkerscountrylife]

Nice video Joe! Man I'd love to find one of those cylinders ans pistons here in the uk to build into one of the saws on my channel.. so hard to find! Keep at it buddy 👍

[@DaveyBlue32]

I’m familiar with the cutting the squish band and running a 268 so you don’t need to cut the base of your actually gaining on your exhaust duration side if you don’t raise the exhaust roof but if you did do you squish band on the 51.4 and then trim the base it’s just that much stronger…. ?

[@bulkleyoutdoors]

Hey Joe, question for you. The new 372xp OE saws from overseas now seem to be shipping with gilardoni cylinders rather than mahle. Do you know about this? If so have you noticed any change in durability or power between the 2? Thoughts? Cheers

[@dynojoemods2764]

Durability and power seem very similar. But I did notice they are using textured ports like the new 592 etc saws.

[@bulkleyoutdoors]

@@dynojoemods2764 worth swapping to an nos mahle kit?

[@dynojoemods2764]

@@bulkleyoutdoors I wouldn't bother on a brand new saw

[@bulkleyoutdoors]

@@dynojoemods2764 right, are all of the new husky cylinders (500 series) being made by gilardoni is that why they made the switch?

[@brettblack7049]

@@bulkleyoutdoors Gilardoni has made cylinders for stihl and husky for many yrs, in the past they were the more desirable cylinders to have. The 440 cylinders they made were nice looking stock(as far as stock goes lol). I have one on my modded 242xp, nice runner with the squish set, the ports matched and cleaned up, and the muffler modded, it screams along at 15k-16 with no problem depending on the tune, then again, I think it's 15.5 from the factory :).

[@RichFreireich]

Joe I have a 2166, and wanted to get a o.e.m. 51.4 but they are impossible to find, so I am leaning towards the highway titanikel 52mm , however I have seen a lot of videos where porters stay shy away from them due to the cylinder plating flaking off when porting? Your thoughts would be much appreciated

[@dynojoemods2764]

I wouldn't use any aftermarket if you want ported. Oem only for porting. Now if it is a cheap saw you just want to get running again. Aftermarket is fine.

[@RichFreireich]

Thanks Joe, I will keep trolling for an o.em. big bore

[@brettblack7049]

You should have Joe port that 2166, those are nice strong runners@@RichFreireich

[@JoshNoss]

I've personally never run a 3/8 8pin on anything but my 592xp I'm running a 24" bar and it'll bounce rev limiter W/O a 8.. was considering a .325 8pin on the 550mk2 you worked up for me as that saw has some *RIP* and I might go 9pin on the 592 once you do your thing with it. Don't think it's worth the torque loss to go 8 on the 572 running 24" on it though I may try it someday

[@brettblack7049]

Why not put a 3/8 on the 550, it should have plenty of power for it. Is the 550 an mk1 or 2.

[@JoshNoss]

@@brettblack7049 its the mark2 and when I bought it I got a whole box of 325 18" chains and a aluminum core 18" bar so I don't wanna switch over to 3/8 and have to get all that again.

[@brettblack7049]

@JoshNoss bummer, I totally understand that, 8 pin it is lol. Down the rd you could go to a 20x38 with a 7 pin no problem. I've ran them with that setup stock and muffler modded and they did just fine, after Joe's been thru it it would run a 20 very well.

[@JoshNoss]

@@brettblack7049 yeah I've had a lot of people tell me that and you may be right, just checked and I got the 325 8pin in the mail today so I'll have to run it and see how that feels soon

[@justinweaver8107]

Great. Build comin right up💪💪💪💪🤘❤

[@DaveyBlue32]

After finally getting a 2165 and for some reason every thinking I’d be really even interested in carrying what is basically the 372 chassis’s in a 48mm popup version…. It’s going to get my last new 51.4 topend… so it will be better power for the weight… I’ve got one that I’ve been thinking about having relining done but I’ve been watching two stroke stuffings for a few years and I saw his nikasil plate in his shop… it’s basically just like the electroplating process where you silver soldier your copper jewelry parts together then you use your sacrificial anode to electroplate your piece…. I’ve got to get a little better understanding of that exact process that TSSuffing used to electroplate his cylinder to see if it couldn’t repair a scratch or scrap…???

[@steppoffaith8426]

I run 8 pin 24" bars on all my 372 and 572xp. The pull them very well just keep your chains tuned to the saws!!!!!?

[@garengtutorial8923]

Mesin yang bagus

[@donjohnson9170]

8 tooth. Race saw run 10 tooth

[@julijanmagda7855]

Try to find w8th extra improwe yubille engine end make a simple test the results Will be suprise ,,,sad its not vomplicated but noubady want to make this on chainsawe usualy,,,its not expensiwe but efivuency us werry nice