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The 26 will be easier to tune and will run better if you don't get it quite right. The 28 can be tuned but you must have at least, the head ported well, with valves and seats cut properly + tuned mandrel exhaust and manifold lengths. Any disruption or unwanted turbulance will upset the 28mm carb...

Yes there is a period when both valves are open. This is called the overlap. Racing cams have increased overlap and this is one of the things to be checked when installing bigger valves and big overlap cams. Should try to always run about 40 thou clearance between the valves at closest point...

26mm for unmodded engine

59mm is quite easily done. You will need to resleeve and bore your cases also. Head sealing must be carefully done either by thin copper gasket (which you can't get), alloy gasket (which you can get but is not 100% successful), sealing compound or more exotic method like a double ground joint or...

You must realise that the different lengths also give different travel...the dnm 645 long fork has 155mm of travel and the 695 long fork has 180mm. One inch less. I use every bit of that last inch! I'd go for the longest fork every time and just run them up the clamps to set the correct rake...

They are very sensitive to the main jet setting and needle position from what I've seen so far, but really let you know when you have got it right. I have only tuned one of these 26 oko carbs but on a modified engine so your settings may differ, but, the 102 main will work although it is on the...

The AS01 are much better in design and some materials than AS02's. The floating piston design means the chamber pressure affects the rate the fork ramps up but not sag or preload or anything like that. It saves from hydrolic lock and also gives an adjustable progression to the dampning while...

ah... thats the go, didn't know anyone was allowing the bigger engines yet. Is there any leeway on the cc like 5%?

i just gotta ring eight mates before midnight....

hey we only fishin' cause your taken tha bait....we haven a lot of fun ribbin cause you are beaten us in FOTM! You don't have to worry bout the other vid, I can see your bike is gonna be competative, just the vid you DID post up showed no gain on the front runners only passing the slowpokes...

Don't get so defensive corey. He was simply surprised as we probably all were, at your video. Especially since your statement that the bike was considered possibly the fastest vert around by mojo themselves...we all can see you passing backmarkers (most likely on bog stock 124's and 120's) with...

the kits I think you will find are Akunars...alot of the online stores have been stocking Akunars kits for a while now. Notice Akunar getting bigger and having a much better range of stuff for China engines in the last 12 months? The 28/24 valve heads getting round are mostly theirs also. The...

The only people can answer your questions are Akunar themselves...they should know what piston of theirs does what? I don't think you'll find many who have replaced the stock piston with same size for a 140 on this forum. I have experience with bigger than stock pistons, but all the domes are...

The pistons position in the bore does not affect cam timing. It will effect squish and compression. It is not ideal setup to be running the piston so far from the deck but will not hurt anything and will run fine providing you still have reasonable compression, which I suspect you will with the...

The AS03 are a quite a different fork you would know if you had them. Look for the fake compression clicker on AS03's. Quick generation 1 and 2 detection on the AS02's ...If you take the clicker knobs off you will see the AS01 has no vents in the tube caps whereas the AS02 and after have a...

Thats why I pay a lil' extra to have stock cams reground. To retain the decompressor. I have doctored the Lifan 140 cams.

Good move nyok, full size boots are damn cheap insurance! Breaks in this region can be very nasty and have permanant weakness or disablement. There would be a few guys out there who cannot ride and jump how they would like anymore because of bad ankle/shin breaks. I find that actually cause...

well the header is def China....

Start a new thread and I can go into more detail if you want. Don't want to fill these tute threads with ramblings.

I don't know that the flywheel balancing is sus. They look to be drilled quite carefully and no two are alike, and logic tells you they have been balanced in a computerised balancer. My best guesses would be the cast cranks not being checked for cracks or flaws in production. A bad one comes...