Planet Minis

soulrider911

I was just a little curious as to which motor the majority of people on here side with. I have been told on numerous accounts that the lifan engines are the best thing going from china. I have had both and I would say my lifan 110 ran way more smooth and was much more reliable than any yx that I have ever owned. The lifan from my experience was the closest thing to a honda.

orracle

Lifan= good reliable smooth engine, not much potential
YX= Huge power potential, questionable quality control

tysonb

lifan is better quality, ride better and you won't have to upgrade the engine to epic proportions.

topr

Have any of you guys run the Lifan 150 with the newer 30/23.5 BVH and if so what cam did you go with?

soulrider911

i have that new lifan 150 is sweet...

Jimi86

Lifan is my pick. I have a 150 and Love it.

crwdirtyj

Yx all the way if you want to go big.

alex_s817

how do the lifan 150s feel? i was thinking about getting the one from sgr-usa since it has the internal hydraulic clutch. right now i have a sikkmx 125, will the lifan feel like a large improvement?

Big specht

Does the YX motor have upgrades than the lifan??? I've also reading alot about these engines and can't decide on which one to get . Which one will hold more high rpm riding??? I have a lifan 138 that as done good soon far, but is there really that more potential in the yx motor than the lifan???

MaXeD-OuT-PiT

I hear that man!!!! I like to go big!!!

buzzcogburn

Im new and kinda in the same boat. I have been through 2 gpx 140's!first 1 did not run when i got my 08 x2 sent it back they sent me another i moded it, pipe,port and polish head ,cam,rev box,and super coil after 4 month of pratice and race the shaft that the clutch basket mounts on, lots of play and the oil slinger broke off !! I talk to pitster pro and they are leaning me towards lifan 150 but I have 2 concerns.first one is the shift pattern 1 down 3 up i here thats not good, u need all up is that true? second one is that it has to be way,way more dependable than gpx 140 will it be? PLEASE HELP!!

Pat Farsole

The only real difference between the two engines being referred to in the subject of the thread (Honda NICE / CRF based 150's) is that the YX has a 1 mm longer stroke and most likely a 13 mm gudgeon pin ... For consistent high rpm use , a shorter stroke engine is going to be more reliable ... just check out the bore x stroke ratio of any road racing engine ... or the Jap 4 stroke MX bikes (CRF150R = 67 mm bore x 42.7 mm stroke) ...

The Lifan 150's have proven themselves to be reliable ... the YX150's have not ... Dog lugs knocked off tranny gears are due to the idiot riding the bike shocking them BEFORE they have been fully engaged into the slots of the driven gear ... These engines have WIDE gear ratios so the impact on the lugs during a shift is greater than it is in a close ratio box ... ie picture two high quality Ferrari race cars flogging down a track , one is doing 100 mph and the other bumps it up the rear doing 102 mph ... no damage is done ... now hit the car doing 100 mph up the rear doing 125 mph and see the difference in the damage ...

buzzcogburn

Pat farsole sounds like you know whats up! Any answers to my first post thanks !

magiksc

IF you are into racing then the YX would be a better choice. The transmission ratio is better for track use, its faster in stock form than the Lifan and has alot more power potential. Honestly a V2 on the YX 150 or 160 makes these motors have more power than 90% of us can really use.

Then Lifan 150 is a way smooth running motor and with a cam and port work these motors rock. then add a 28mm Carb and you've got a dependable very fast motor and the upgrade cost is only a few hundred $. The wide ratio trans. gearing is awesome for street motard use... Ride wheelies off the line and still run 70+mph. the motor is lighter and narrower than the YX engines but the power options are limited. Really you don't need to worry about the trans. on these motors. They seem to be tough as hell!

The Lifan 150 is not a 1 down 3 up trans. it is 4 up.

My Opinion, as I have owned both and raced both over the past year, the lifan is a great motor all around and makes nice power in stock form but is slower than a yx 150 both in stock from. If you plan on getting serious into racing in any of the open classes the YX 150 would be a better choice due to the easy of bolting on a V2 head or one of the many BBK available. If you see yourself just wanting a motor that is quick and not really wanting to build a ridiculous race motor the lifan is a better choice.

Pat Farsole

Steer clear of the 1D3UP engines ... Genuine Lifan 150's are 4 up for a very good reason ...

I'd say the Lifan ORK ignition has got a lot to do with their reliability ... erratic ignition timing and over advance can easily trash the most expensive high quality engines in the world ... Stock engines are balanced to suit the stock rev range and they are rev limited to a known to be safe and reliable peak rev ... Removing the rev limiter without altering other factors to allow the engine to survive at higher than stock revs is similar to removing the safety pin from a hand grenade ... then wondering WHY it blew up on you ...

As I stated in the below thread ... Lifan has most likely made subtle alterations (which are not understood by or visible to the average Joe Blo) where needed in order for the 150 to be more reliable than the older engines including the 140's ...

http://www.planetminis.com/21/lifan-...h-82720-3.html

magiksc

The GPX/YX engines from Pitster have a very similar ORK style ignition now, making them alot quicker than they were in 08.... Not to mention Pitster is going through very motor they sell now.

PorkChop247

i own a yx 150 with
26mm Carb
Custom Manifold
V-2 Head
170 Kit
Air filter Kit
Spark Plug


and its a BEAST/ROCKET SHIP!

buzzcogburn

pat farsole thanks. i am a racer out door and arena cross PITSTER TOLD ME THAT I COULD PUT MY PORTED HEAD AND CAM OFF MY 140 ON THE LIFAN150 AND IT WOULD ROCK I JUST NEED IT TO BE RELIABLE !SO IN YOUR OPION I NEED TO GO WITH THE LIFAN 150 AND ALSO WITH THE OUTTER ROTER KIT WILL IT HAVE THE PULL OUT OF THE CORNERS LIKE THE REGULAR SET UP .

LoudFastUgly

I've just recently acquired my first Lifan engine (125 1p54fmi). I must say, the more I see, the more I like. Seems stout (engine weighs in just under 50 Lbs) , doesn't have that cheap 'feel' that some of the other China product does.

Pat Farsole

Ha Ha Ha ... I appear to be in the wrong thread ...

There are TWO types of YX150's ... the Honda Nice /Lifan BVH type headed engines that have a Daytona type clutch cover and oil filter ... AND the KLX headed type ... WHICH engine are you referring to ...

When talking about the KLX type YX150's and their mods , it would greatly help bring the guy to a quick conclusion if the KLX YX150 advocates would post the difference in final total costs for the still unreliable modified YX150/160 VS the Lifan 150 ...

In the end he'll most likely go for the moderately priced engine that gets the job done without breaking his bank account on an ongoing basis or requiring him to be a diagnostic mechanical engineer and proficient mechanical fitter just to keep the thing running ...

KLX YX150 has a cheap and problematic IRK , the oil slinger fails , clutch fails , crank can break when modded to rev , cases can crack and kick starter mech can fail due to compression and kick back if the compression is increased ... I watched the Aussie Dirtmax rep changing the stock IRK of brand new YX160 engine in a new bike and replacing it with an ebay/ Kitaco type IRK ... He said they can easily fail like that ...

So far the Lifan 150 appears to be holding up well ...

The Daytona type YX150 has shown it still suffers from case breakages and clutch problems in stock form ... a guy was trying to get rid of two of 'em on ebay Aus ... There was zero interest at $200 each ... and one of the engines looked to be near new ...

The new YX160 with the ORK ignition looks promising ... BUT the YX factory left out any form of oil filtering ... They SHOULD have fitted their Daytona type clutch cover with built in filter to the 2009 160's ...