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08 pitster pro issues

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Hello all, i hope to get some input. Iv e got a new x4. Been through the bike with loctite. Now my issues. The bike smokes a bit when started. Not 2 stroke, but a bit of burning oil smoke, even smells like it. any one else have this issue. I have changed the oil with good oil and still have the problem. also did the heat cycles as well. Also have a jetting issue and would like some input from others that work. Bike will not start when it is cold out. Choke does not seem to work warm or cold out. Seems to start better with out it. When it warm out after letting the bike warm up for 10 minutes at idle bike runs fine. A little flat on top but at least it runs. Contacted pitster and they said they will have a jet kit soon. Any help would be great.

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Do you have the 150?

If so, the mains are the same as OKO. The pilots are the same as Mikuni VM28/1001, Start with 25 pilot and 120 main. I got my mains from hondatrailbikes dot com. Pilots took some searching. If you have the 140, I don't know if it comes with the same carb or not.

Do a search and you will find some threads on this topic.

Did you drain that horrible oil before you ever started it? A little smoking is normal in the beginning.

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First off Going to need some more info....:)

Some guys are having Pitster custom Upgrade there bikes before they ship so we need to be on the same page..

Need to know what Carburator, Motor size, where you Live to help with the Jetting.

Need to know stuff:

No ones bike or motor is going to be jetted correctly out of the crate/Box...some will be rideable...and some will not even be close...:cry:

Just so everyone reading this realizes that some where along the shipping route some of these bikes and motors spent some time (Upside Down) and got oil where it shouldn't be.... Everywhere...:banghead: But thats not Pitsters fault...we can work around it...:applause:

i'll be on here all day so get some info and pictures up...

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it is the 150. and i did not have any thing done to it. I bought the bike directly from pitster and was crated when i got it. I live in the st louis area not sure of the elevation. Yes i did change the oil, if thats what you want to call it.

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Ok, First off you have the MOLKT 26mm Carb

you need to source some (pilot and Main) Jets for it.

that carb is a Mix of a couple of Carburators a Mikuni and Keihlin or OKO

Pilot Jets are Mikuni VM type a # 25 will work great

next you will be using (OKO) Mains (Source them from Trail bikes) they make a Jet kit for $15.00 it wll have (8) or so Main jets to work with #95 > #135 main Jets

I was told By Gary at Pitster that a Jet Kit was going to be Made availible for these Bike...( They are Not as of yet)

the reason your bike is hard to start now is the Pilot is real lean

your going to need My Simple guide to help you Tune and Jet a carb.

1) GET A PLUG READING: You need to run the bike in as tall of a gear as you can. and then kill the engine with the throttle wide open. Dont idle the engine, now remove the spark plug and look at the INSULATOR, the white porcelain part. as a rule it should look like coffee and cream( TAN ) If its Dark brown or sooty black your motor is running RICH. A gray ashy or white reading means its running LEAN. A plug reading only gives you an overall view of how the motor is running.

Do this with a new plug and make sure your bike is warm first.

2) THE MAIN JET: The carbs main jet affects how the carb works from half to full throttle After you have made your test run with the stock jetting. Install a main jet that is two sizes richer it will have a higher number than you removed. do your test run again, pay attention to how the bike feels. If your bike is reluctant to REV out like before, then you are too rich. Now go back and install the next smaller main jet keep doing this until you feel a noticable improvement in power once you have the main jet set go on to your pilot jet.

3) PILOT JET: The pilot jet has the greatest influence from idle to 1/4 throttle to test the pilot jet that is two sizes richer (just like the main jet) now go out and test it pay attention to how its feels when you pull out of the slow turns. If your bike is too rich it will feel sluggish and unresponcive untill you are past 1/4 throttle A perfectly tuned pilot jet will help your bike accelerate off the line and out of corners. Repete this test until you get one that feels the best.

4) THE AIR SCREW: How to adjust it, with a warm engine bring the bike up to a steady throttle setting (about 1800 rpms) get a friend to hold the throttle steady......Once the engine is running at fast idle. Turn the air screw in clockwise until the engine rpm drops. Then slowly turn the air screw out until engine rpms pickup.....Stop turning the air screw once the RPMs reaches its peak. Peak rpms is when the engine runs its cleanest and fastest. The most common air screw adjustment is from 1/2 a turn to 2 turns out. If your air screw is more than 2 turns out it is a warning that you should switch to the next LEANEST PILOT JET....If the engine has peaked before turning a 1/2 turn out. Then switch to the next largest Pilot jet.....

5) NEEDLE JET: Your carbs needle affects throttle settings from 1/4 to 3/4 turns lucky you dont have to replace the needle to adjust. Start out with the clip in the middle setting make a couple of runs, then change the clip down two positions. This is the quickest and fastest improvement you can make to the bikes jetting. Dont be afraid to move the clip up..LEANER or down..RICHER. You spend most of your time riding in this range.

Try all clip positions on the needle see what runs the best.... If you find your clip position at the very top or bottom. then you need to go back to your main jet and pilot jet and make a different setting...

When all is done your clip should be in one of the three middle notches.

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I've noticed that both our X4R's smoke a bit upon start up and are a bit boggy on the low end until they get nice and warm. Still haven't played around with the jets yet as they are both running ok so far. We don't have 91 octane here in Vegas so I am running 91 with octane boost.

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I've noticed that both our X4R's smoke a bit upon start up and are a bit boggy on the low end until they get nice and warm. Still haven't played around with the jets yet as they are both running ok so far. We don't have 91 octane here in Vegas so I am running 91 with octane boost.

the 140cc and 150cc are low compression motors they will run fine on Pump Gas...no need for 91 octane

if your running octane booster your definetly in need of re jetting your (Lean) and your motors running Hot

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What he said. Don't run high octane gas on low compression engines. It promotes carbon buildup.

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Well this is contradictory to the initial information I received to run 93 Octane. Is the consensus to run standard 87 octane in these engines?

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Run what you want...but theres no need for Race Gas, or a mixture of gas with Octane Booster!!!

the Stock Pit bike motors (Pitster, OGM, SSR) ect ect all have Low Compression Motors and running race gas or more than Pump gas Can cause all kinds of jetting issues and carb problems.

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Thanks Precision. We'll try the 87 octane.

Go Sox!

Run the super instead of regular with all the ethanol added in the gas

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I thought I liked you Kevin, but if you're a pats fan.........:cry::applause:

Sorry, couldn't help it. Disgruntled Charger fan here.:)

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ok i searched the mikuni site here on tt and was wanting to know if the pilot jet listed in here is the right one for my bike. it is m28/1001. #25. sorry guys never had to mess with a carb before.

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ok i searched the mikuni site here on tt and was wanting to know if the pilot jet listed in here is the right one for my bike. it is m28/1001. #25. sorry guys never had to mess with a carb before.

Yes For the MOLKT Carb that comes on the Pitsters and the VM26mm that comes on the New OGM Bikes

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