In this video I install a Big Bore kit and Dual Port muffler on my G372xp. These upgrades enhance this saw's power and sound, which is evident at the end of the video.
Wow I was wondering why this is my third build on my saw. I took it to some mechanics and the saw seems to always seize up but now I want it big bored with a duel port exhaust just like what your making. Thanx for the help and ideas I needed.
Thank you! Great video, detailed really well. I like the trick with the screwdriver through the roller bearing to install the wrist pin, I hadn't thought of doing that. Whenever I put threebond on in place of the gasket I tend to get some onto the Piston by mistake, which can (and has) lead to a ring actually sticking inside of it's groove... A way I have developed to avoid this is to actually install the Piston into the cylinder before putting the piston onto the crankshaft... With the Piston submerged in to the cylinder, then put the threebond onto the mating surfaces... then there is no chance of the threebond getting into one of the grooves by mistake. Great video!!!
I have a husqvarna 3120K saw with the 119cc 9.2hp engine and I just did this same upgrade on it. I ordered the 60mm piston/ring/cylinder kit on ebay for $85 and installed it easy, just 4 screws right on the top of the head so very easy to get to. I ported the muffler outlet and added a 2nd exhaust tip and this saw is an absolute beast now. Only problem is it weighs 50lbs since it's a racine rail products ultra kut 2 but it costs $2900 and I bought it for only $40 non running and greasy and rusty. Took it home and added some 2 stroke mix and fuel immediately started shooting out of the fuel line. Replaced the fuel line and fuel filter and it started right up so I washed it, removed all of the rust and polished it up real good and now it looks tough and runs very strong. This saw is so big that it's impressive to look at just sitting on the floor of my office. I run it with the top cover off and a k&n air filter on it because the muffler, head and carb are so huge on this saw that it looks better with no top cover. I have only $160 total tied up in this saw including the $40 for the saw, the piston kit and a few cosmetic parts so I'm very happy with it.
Hey big Tex, make sure you run with adequate cooling air being forced over the cylinder, without that top cover you may toast that new cylinder in no time! I bet it looks cool though!!
I think it is easier to get the cylinder on and off if you leave the intake boot and carb assembly on it. Easier for me anyway. Also fighting the boot could cause a rip or hole in it after it has a little age on it. Great build btw. Also a place in Va named LiL' Red Barn makes a nice 52mm pop up piston kit for around $30, it's what I used on my build and it's awesome. Really snappy saw.
Chaps and hearing protection. Essential for hearing after using chainsaw. Always. Don’t ask how I would know……but you really don’t want bird symphonies constantly sounding off in your quiet moments, when the birds aren’t around. Chaps are cheap, and the first time you need them you will be glad you are wearing. Bonus points for keeping the oil and sawdust off from your jeans. Spoken from a crusty old man who always learned the hard way to prevent a youngster from harming his self because no one bothered to explain. Additional information- saws are addictive. Any saw brings out the man gene and there always will be one that fits a specific job a tiny bit better than the one you have with you. Cheaper than race cars or other manly quests. After using for a while, what is your opinion on the addition of a couple of cc’s? Change the cut speed enough to justify?
Putting it together without the gasket lowers the ports, slightly de-tuning the port timing, but also raising the compression slightly, best stay with the gasket unless it was made to be that way, or you know different.
If you warm the piston with a heat gun the pin goes in easier, and that cap of oil actually leans out the mixture slightly, if you change the mix check the tune,,
Just put a hyway big bore kit on mine with caber rings and pop up piston. Waiting a day for the yamabond to cure. Base gasket delete. My first try. I hope I didn't mess anything up. Mine only had 120 psi from hutzl. Base gasket measured 23 thousandths!!
Looking to get into one of these saws. Split between this and the G660. Reason I am at a crossroads is because the 660 can run a longer bar. Do you think with the extra power the g372xp could handle a +30 inch bar? I mean hell it's probably for show anyway but just wanted to ask.
@@Shawnf1977 IMO it depends how often you would be running a long bar. For regular use I'd recommend the 660. If just here and there with long bar the 372 big bore will handle a 30" bar , but again regular use would be hard on it.
@@nickywalsh8492 same here just trying to survive ,after my health scare I just keep to myself , I don't talk to Matt no more he thinks I ripped him off I sent his package to him 7 times and it kept coming back
Why are you bothering to do this on a new saw? How was the clone 372 working out in the long run? I just bought a couple of these clone saws a couple months ago. Just put together a 372xp from a parts kit but not much use yet. The Holzfforma G660 power head I bought broke the G tang off the piston pin retaining clip on about my 8th tank of gas cutting firewood, trashing the top end. Hutzl claimed a 1 year warranty when I bought it but instead only offered me a new cylinder kit to repair it myself. Only a $23 kit on their website. Meanwhile I spent a good 8 hours total time tearing it down and putting it back together myself. Pretty shody customer service if you ask me. I just got it back together but haven't tried it yet other than first start. It's the midst of winter here in the northeast US so weather sucks right now. I been reading and seeing in peoples clone saw video's that the G part of the clip breaking off is a common problem on the saws with G style clips instead of the C clip. If your building one cut off the G tang upon assembly.
Thank You for the Great Video very detailed, Im thinking of doing this, Is there a reason you did not use a base gasket just wondering and any other advise would be great. Thank You
Taking away that base gasket gives even more compression and he may have done it off camera but it should be checked for squish to make sure the piston has around 20 thou clearance at TDC min on this saw as it heats up it stretches and you dont want the piston hitting the head
First off, this is a very well done instructional video. Second, could a guy do a base gasket delete, big bore, and a pop up kit? Or would that be too much? And what do you run for fuel ratio?
That's a good question. My thoughts are that that's asking too much. I blew the spark plug out of mine recently. Had to order new cylinder. Best to keep it it as is.
Do you notice a difference in power from the 50mm top end? I have the same saw and was thinking about doing the same. Nicely put together vid, thank you.
