valve adjustment, linhai engine By frankresso (Read 5,919 times)

[frankresso]

hello i have a roketa mp250a jcl. it did not run when i got it , cleaned evrything. did a valve adjustment will run now ( set the intake at .011 and the exhaust at .018) spuders when you throttle it or if to fast will stall. ok anyone know the correct settings thank? runs with these now but ticking and slugish out of the hole. thanks guy's
;D

[frankresso]

hey guy's going to do this saturday and this time not going to remove all plastic under the seat. going to cut the battery bow of then can get right to it. any thoughts on this to? have any of you done this? i read this on a post somewhere. i bought it not running and it take way too long on the plastics to do 15 mins of work.

[bhinch]

Hi...the intake is set at .004 and the exhaust .006.....this will do the trick...you will have to reset the idle after the valva adjust...takes the beast out of the scooter....enjoy the ride...

[bhinch]

Just a note....change the valve stems....to balance the tires add DynaBeads.....change brake fluid...change oil, I use 10W40 and transmission oil 85/90 gear oil....change the coolant......50/50 mix....and do a good PDI.....check everything for tightness and general condition of the scoot....not hard just needs to be done.....the valve adjust will go a long way to getting it up and runnng..I have a Roketa MC54B-250 Cyprus....2008 model....Silver....3000 miles and smiling all the way to work and back....highlight of my day....... the guys and gals on this forum will help you in anyway they can....great folks....enjoy the ride.....

[dabucs]

I cut the plastic where the battery sits. I use .004 on the intake and .005 on the exhaust...I also had to buy a valve adjust tool because using needle nose pliers to hold the valve stem wasnt working for me as the vavle would turn as I tightend the nut...ill see if I can find the link to what tool...I had bought it at a yamaha dealer, as the linhai clone is a clone of the motor used in yamahas....

[dabucs]

Heres the picture of the tool and steps that rubicontx over at scootdog had posted

[frankresso]

THANKS wow you guys are great i will do what you have asked me to do after i get it all cleand up i paid $800 for this scooter has 1900 miles on it. i think i will need to get a choke (enrichner) for this, wont idle up when started. i do love the ride of it. hey but thanks to you 3 that replied to this post. i dont want to adjust twice in one week. thanks again guys

[frankresso]

oh hey bhinch what is a PDI? i dont understand sorrry, but i am very mechanical inclined though lol

[Alleyoop]

Here is were you can get the Valve AdJ Tool:
Alleyoop
www.boats.net/parts/detail/yamaha/Y-90890-01311-00.html

[Cruiser]

Apr 30, 2010 20:12:32 GMT -6 frankresso said:

oh hey bhinch what is a PDI? i dont understand sorrry, but i am very mechanical inclined though lol

Hi frankresso. PDI stands for Post Delivery Inspection and it's something that should be done upon receiving your scoot and before putting it on the road. Of course, if you buy your scoot from a local dealer, this should already be done. Here is a link which should give you all the info you need:

chinesescooterreference.com/pdi.htm

[dabucs]

Apr 30, 2010 20:12:32 GMT -6 frankresso said:

oh hey bhinch what is a PDI? i dont understand sorrry, but i am very mechanical inclined though lol

PDI is Post Delivery Inspection

The one from Big Guy:

x1scooters.com/pdi.html

[frankresso]

ok did my valve adjustment , runs alot better, stil not so quick on the throtle responce. no leake on the crab or vacuume hose , sprayed carb clean on them. confused on that, i need to get a electric choke thing , dont work.

[bhinch]

Hi...frankresso....glad the info helped....we are all here to help each other out with tech info...enjoy the ride....we feel the same air that all the other riders enjoy....thanks..