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Mountain, has the Fastace manufacturing quality control improved over the past 2 years in the BS66-RC? Last time I looked at that shock (late 2007), people were saying it was either great, or great for a couple of rides then it died. See also my post here: Rebuild Fast Ace BS-66RC Shock -...

Yes I'll stick with the 800 spring, and try get decent shock dampening to operate with that spring. Dave wrote to me today and warned that the shock might have lost its nitrogen. Because it faded so quickly/badly. But his fluid should work nicely in it. I have the 3.9L bottle of SPI-3, and...

absolutely. You got 215 in your pitbike shock?? The front is so good I want the rear upgraded now. Not sure if I put 215 in my DNM or get something else. Not cashed up lately but also don't want to waste money on the dnm if it is just a dud. I tried a 1000 and 800 lbs/in rear spring and I'm...

The air screw only effects the early part of the throttle range. If your engine splutters at 1/2 to wide open, then I doubt the air screw will fix it. Dirty air filter, and therefore too rich? If not too dusty, try a quick test with no air filter installed. Did it once run fine with the...

Hi, and thanks. No, this fluid feels at least 10 times better than the motorex. Seriously. The motorex was 10 times better than the stock fish oil Visit SMART Performance Inc. www.smartperformanceinc.com Fork oil volume controls bottoming - well it is supposed to. More oil = less bottoming and...

I put 250ml of 215.VM2.K5 VIBRATION CANCELLATION FLUID per leg in my pitbike forks and oh boy what a transformation! They feel like pair of good Jap made USD forks of a modern 85cc bike. Super plush on pretty rough terrain, and no wrist jarring on big hits. It feels like a $1500 upgrade but...

After what feels like 6 months, today I finally rode my pit bike again. Firstly must mention that the punchy throttle response of the Lifan 150 with the Akunar A1 bottom end cam is just unreal. With the Lifan wide spaced gear ratios (meant for road riding I assume and stupid for MX), the A1...

Nice post DeanoOz! Is your inlet manifold one of those hard plastic ones? Check your valve clearances anyway. Often they are set wrong when new, and big improvements (in starting, power, response and idling) if they are set right. Is super easy to do with rocker tappet adjusters. I'm...

short.y you might find an broken whole engine, which if you are lucky has the parts you need in working order. If your 150 if a Lifan, then the Lifan 140 gearbox will have most gearbox parts in common. Shing, It's not just clutch usage which defines being careful. It's also an issue of how...

eg. see GPX 1d3u false neutral fix with SDG/Lifan star? - Planet Minis You could either crack it open and check it out, or just go buy a new engine. Chances are high the gearbox is screwed. The china gear boxes can be pretty delicate when new. When new needing frequent oil changes to...

Not my idea, but apparently this is how it's "always" done when moving in the direction I want the stem to go. ie. more toward the middle where there is plenty of metal. Each clamp: Oversize mill a circle hole around the old hole centered more fwd. Then press an billet alum disc into that...

I've given my clamps to a machinist to get the offset reduced. I'm going for a big change, from 37mm to 30mm. A 2mm change (24 to 22) on my big bike was easy to feel and slow down the steering a lot and in most conditions improved my turning. So 7mm seems like heaps on my mini, but I don't...

Rear spring specs include the unloaded length, the internal diameter, and the spring rate. You'll need to work out your spring rate. Either it's written on it, or the seller can tell you, or you have a wild guess, or get it measured by a local bike or car suspension shop. Then you can phone...

RC, good of you to post results. Beware of old fluid. If ANY doubt do a full flush. The china brake systems are poor at keeping moisture out. Very quickly the fluid turns into corrosive crap and things start to jam up. Good that you lubed up the slides. That's always the first thing to check...

You're welcome BigM and londin. I needed a brain timeout. Been working on other stuff for a couple of months. Love thinking about dirt bikes. I forgot to mention some other things: * We all know the stock chains are often stretchy. My Lifan 150 has enough grunt for me, so I use an RK O-ring...

$heepy, The viscosity of the fork "oil" can make a big diff. Especially in USD forks with adjustable dampening where 5 or 7.5wt works best. Old style conventional forks from China usually like some heavier fluid like 20wt. Cheap fork oil from Shell works great, and i doesn't cost much. To...

Hi Freak370, I guess you just want to hot the engine up, but in my opinion that's about 25% of the fun. Firstly it has to not break down, then it has to handle ok, lastly you need more HP. Some ideas for you in approx order of importance: * Engine: Just start with a quality air filter...

jh25, you answered my first question (above), but what about my other question? Come on, I tried to help you. :(

No kick starter shaft on the engine right side? What is the ebay link or item number for the lifan 110 elec start engine?

No sorry, I was being a smart arse. I think that if you do repeated jump landings, the battery mount will eventually break, or the battery itself will fail, or wires will get loose. Also I think that putting a 2kg battery on the bike will make jumping less fun. Batteries are normally mounted...