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G'day. Just picked up a 55.5mm "High speed" high comp piston from Akuna and was advise that running a head gasket is not necessary and even inhibits performance. What do you think fella's. Has anybody needed to shave this piston for valve clearance in the Lifan 138 alloy barrel, oil cooled from...

Anybody running 1 on start in neautral only bike. Good point Ryan. I have one in my 138 with light oil sliger, but agree their is still a lot of weight on the clutch side anyway. I have another IRK but have not been game enough to install it on my Loncin 120cc( manual start only in neautral...

G'day all. Weird thing happening, fuel is coming out of the carby and in the air filter. The motor is running fine though. Has anyone seen this before. I'll pull down the carby when I get the chance. Ride on.

Cheers Thanks for that extra info mac, all is appreciated. Is anybody riding a motor built by Casey shore motor. Waiting to see what his dyno results are like. He has been helpful also, shop in sydney if anyone needs a good mechanic. Ride on fella's.

Cheers Thanks alot. I'm downloading it now.

G'day all. I just got a mail saying I could get my 138 head exchanged for one that has been ported and polished. As I have not rebuilt a 4 stroke top end before, could somebody please explain the correct procedure. Main question I need to answer is, How do I have to remove the cam chain...

Had same problem G'day mate. I had the same problem with my 138. I ****** around for weeks trying to jet the thing just right but just could not be done. Stuck a 25ml mikuni with the stock 97.5 main jet out of the 30ml carby and it revs out fast and clean all the way to full throttle held on. I...

JUST installed irk G'day mate, I run the same motor as you. I irk is great for throttle response. But you have to ride it more like a two stroke higher in the rev range if you want to maintain engine torque. Climbing hills for example you need to rev the bike harder. But I expected that. I...

G'day all. I just insalled an IRK, alloy sligher and a high output coil to my 138(127cc) alloy lifan oil cooled stock motor. It rocks. I am very impressed with the throttle response, as I grew up riding 2 strokes anyway. It really fly's off the mark now. However hillclimbing torque has...

There are all the same. Chinese have copied the japs very well in this instance. I just pick up a complete kit for a steal. It includes alloy oil slinger. Can't wait to install it this week. Have another one for sale, but you will have to lighten your slinger yourself, or not? Peace, ride on...

Yeah Yeah holes in ghe centre but as long as there not to long will work anyway, find out in the morning I guess. Catch ya mate.

Thanks just wanted to make sure. Cheers mate. I am gona get a new line, but really want to ride tommorrow and nothing is open of course. Wondering if I can just use the bolts off the oil cooler to block the crank case holes or will they be to long? Ride on. epod

Burst oil cooler line, please help. G'day merry bloody christmas. Was have a great ride today ohn my138cc on some MTB trails when after flogging it for about 2 hours one of my oil lines brurst, leaking oil everywhere. Made it back to the car no worries. Has this happened to anyone. Really want...

Motor is awsome with 25ml carb instead of 30ml G'day man. I own a dhz 138 alloy motor. Took me five weeks toget it reving hard and fast. Turns out the 30ml carbie was **** house. 25ml japan mikuni has made it rev alot faster and with no stuttering. It's heaps faster than my 125 alloy engine...

Thanks alot for wiring. Cheers Geoff. I guess i shall install it sooner or later, still worried about the crank though. How's your going?

Problem solved Horay, the ****** is finally flying. Thanks guys, turns out the 30ml carbie was ******. I pulled the 97.5 main jet out of it and put in 25ml japanese mikuni and now she rev's till the cows come home. Anybody with a pit pro or DHZ 138 I suggest you throw away the 30 chinese mikuni...

How long have you been running the irk. G'day mate, I have an inner rotor kit for my 138, but I have not been game enough to install it because I have read that if you don't light'n the oil slinger the crank will brake. How is your going. Do you have a wiring description please. All the best...

G'day all. Tuning the 138 up here at 1000 above see level has been a challange believe me. The carbie has a 97.5 main jet, with needle lowered all the way clip in top position it seems to run ok but still intermittently rich rich near full throttle to full throttle. With 95 main jet needle...

G'day miniriders, I just brought an inner Rotor Kit, but now I need somebody to machine the oil slinger for me so that the motor does not kick back. Does anybody know what I should pay for such a job and how much time the job takes? Cheers, hope you got a ride in today.

Cost of Machnining crank and oil slinger Thanks for the info roost. How do you machine the crank still in the motor? How much do you charge for such a job? I am a long way from you though in Jindabyne. Probably not worth the friet. Looks like I'll win one on ebay though, so I have to work...