Any Chinese chainsaw and chinese parts discussion

[Czed]

I've got a few cylinders to play around with i'm trying to find meteor and husky oem used pistons i have to compare i keep losing stuff lol may have put them in customers saws i had another mahle 372 i misplaced or used as well.

 

[Terry Syd]

The 3rd and 4th jugs down appear to have transfer ports for a 365. One of the big bore kits I got also had 365 ports on a 77cc jug, it ran terrible. It is something to watch for with the Chinese copying things, sometimes they can really stuff it up.

 

[Czed]

The 3rd and 4th jugs down appear to have transfer ports for a 365. One of the big bore kits I got also had 365 ports on a 77cc jug, it ran terrible. It is something to watch for with the Chinese copying things, sometimes they can really stuff it up.

I'm going to open those lowers up immensely probably wear a carbide burr out lol but overall both kits are pretty well made the huztls have it for bolt on and go it's very close to the mahle in most respects it's only like 25.00 a kit shipped so i will see what i can get out of them.

 

[Czed]

The 3rd and 4th jugs down appear to have transfer ports for a 365. One of the big bore kits I got also had 365 ports on a 77cc jug, it ran terrible. It is something to watch for with the Chinese copying things, sometimes they can really stuff it up.

Have you tried many big bores the one's i put on for people never impressed me much i did do a 371 that's stout but these newer kits are much better than the old ones i used.
I might try another huztl bigbore.

 

[Terry Syd]

I'm going to open those lowers up immensely

Take a look at the size of the transfer port OPENING nearest to the exhaust port. The width of the window of the port is less than in other jugs.

We're talking time/area on the port window. You can either increase the timing on the port (not best choice) or you can increase the area of the port (make it wider) to increase the time/area for increased flow at higher RPM/displacement.

The jug I used on my Asian saw was from another distributor of Chinese chainsaw parts in Oz. He was posting on AS and I hooked up with him. The jug wasn't too bad, although the exhaust port roof was wonky and I had to clean it up. I ended up raising it another two degrees just to get a proper movement on the rings upon closing the port. I fiddled it a bit by putting a bit of bevel on the top of the rings. If they had got the casting right for the exhaust port it would have been a great start to a big bore.

The problem with the big bore 372s is the area of flow under the piston at BDC. Maximum flow through the transfer ports occurs just before BDC. At that point on the Big Bores there is very little room for flow, the piston has been moved out further into the transfers and restricts the flow - yet, the engine is bigger and you need MORE flow.

The fix is to remove the sides of the cylinder next to the transfers up to the level of the base gasket. Then trim the underside of the piston to get as much flow as possible at BDC. At BDC, I trimmed the side of the piston to allow more flow into the transfer tunnel (so the flow could turn UP as soon as possible). I then added two small holes to the side of the piston that were open at BDC.

Now the engine has the potential to flow like a 77cc engine. Do a muffler mod and carb mod - and you have got a strong and inexpensive 77cc saw for bigger wood.

 

[Czed]

I haven't even started messing with these i opened the 365 topend up it really helped it when i get time i will get these ready waiting on intake boots and my new burrs to come in.

 

[Terry Syd]

Good luck - in Oz, the modded Chinese saws can do a good job - and if they get straight gassed, run over by a truck, had a tree dropped on them or just blow up on their own - you can buy another two to replace to the old one.

 

[Czed]

Good luck - in Oz, the modded Chinese saws can do a good job - and if they get straight gassed, run over by a truck, had a tree dropped on them or just blow up on their own - you can buy another two to replace to the old one.

Exactly cheap fun lol I've only got about 300.00 usd in each.

 

[Czed]

Take a look at the size of the transfer port OPENING nearest to the exhaust port. The width of the window of the port is less than in other jugs.

We're talking time/area on the port window. You can either increase the timing on the port (not best choice) or you can increase the area of the port (make it wider) to increase the time/area for increased flow at higher RPM/displacement.

The jug I used on my Asian saw was from another distributor of Chinese chainsaw parts in Oz. He was posting on AS and I hooked up with him. The jug wasn't too bad, although the exhaust port roof was wonky and I had to clean it up. I ended up raising it another two degrees just to get a proper movement on the rings upon closing the port. I fiddled it a bit by putting a bit of bevel on the top of the rings. If they had got the casting right for the exhaust port it would have been a great start to a big bore.

The problem with the big bore 372s is the area of flow under the piston at BDC. Maximum flow through the transfer ports occurs just before BDC. At that point on the Big Bores there is very little room for flow, the piston has been moved out further into the transfers and restricts the flow - yet, the engine is bigger and you need MORE flow.

The fix is to remove the sides of the cylinder next to the transfers up to the level of the base gasket. Then trim the underside of the piston to get as much flow as possible at BDC. At BDC, I trimmed the side of the piston to allow more flow into the transfer tunnel (so the flow could turn UP as soon as possible). I then added two small holes to the side of the piston that were open at BDC.

Now the engine has the potential to flow like a 77cc engine. Do a muffler mod and carb mod - and you have got a strong and inexpensive 77cc saw for bigger wood.

Thanks for the info more people are giving these a chance here they are new to me the chinese saws I've worked on a lot of oem saws and these really have some potential and they are sooo cheap lol

 

[Mattyo]

Here's the start to my bolt for bolt vid:

 

[Czed]

Thanks. I was to lazy to build one looks good.

 

[p61 western]

Thanks. I was to lazy to build one yet looks good.

Fixed that for ya Dave.

 

[Czed]

Here's the start to my bolt for bolt vid:

Was the part's pretty decent quality from the kit mine was much better than expected.

 

[Mattyo]

I am still not sure if I trust the starter cover and the muffler he leaves quite a bit to be desired I removed the seals Obviously I may or may not have needed to remove the bearings obviously I will check and see what other parts are viable

 

[Czed]

Great customer service again with hl supply one of my 372 cylinders had a gouge through the plating in a couple of places on the intake side they are sending me another one.

 

[Czed]

No problems but 30.00 dollars got me a whole stack of common parts so if ever i do have trouble i will have them onhand I've paid that much for one recoil before lol 2 recoils 2 carb kits 4 intake boots 10 barnuts 2 airfilters 6 exhaust gaskets 2 carb housing rubber thing's etc

 

[Mattyo]

Still don't know if I trust those recoil housings... i'll try it for my build, but ... i dunno.

 

[Czed]

So far so good but when i up the compression that will tell the tale i know there is different company's making these some of the aussies never had trouble even after bumping the comp way up hit or miss i guess oem recoil is always there lol

 

[Terry Syd]

I never had a problem with the recoil, but I did break a starter pawl on the flywheel. I replaced both of them with OEM. The Chinese starter pawls were made with thinner metal than the Husky pawl.

 

[Czed]

I never had a problem with the recoil, but I did break a starter pawl on the flywheel. I replaced both of them with OEM. The Chinese starter pawls were made with thinner metal than the Husky pawl.

That's what i will do no big deal simple saws to work on no problems at all and i don't expect any I'm a drop starter lol