does any one know anything about the old quad racers?

[MUDBOY]

i got a 87 lt 250r that when you start it up it revs really high and it wont idle down. we adjusted carb and all the idleing jet. but the 87s got the power vavle could the power vavle be bad?

[MUDBOY]

its not the power vavle i just took it apart. what else can it be?

[CBakes]

its not the power vavle i just took it apart. what else can it be?

It very well may be sucking air in through a crank seal....I've experienced that first hand on my 88 LT250R. Had to split the case all the way down and put all new crank and case seals in. I can almost guarantee that you have the same issue. It is scary if it happens when you are riding. The bike will go wide open until you shut it down. Be ready to upshift while applying the brakes ,until it stalls out. Or have a good kill switch system.

[burl]

yep, was gonna say the same^^^^ on its way to blowing up

[wayne w]

had one that did that it was the crank seal  it took out the rod bearing

[MUDBOY]

we are taring it down this weekend thats one thing we will check thank to all.

[mudbillyredneck]

could be leaking at carb boot or under jug near intake ...also

Spray ..." A little shot"  of starting fluid around jug and boot and see if it revs up again....be prepaid to dump the clutch to bog it back down however ...otherwise it could really rev up " alot"

[crazy muddin niner boy]

Definetally sucking air somewhere

[my broke ass ford!!]

here ya go this is the best way to check a 2 stroke motor here is a link on how to do and make a leak down tester for small motors for 20 dollars this will tell you where and what is leaking chaseing a leak just useing spray and waite for the r's to go up can give falce readings sometimes when you spray if just a small amount in a cloud of starting fluid drift by the mouth of the carb may have you chaseing a leak in the wrong spot 
here is that url http://www.powersportjunkies.com/showthread.php?t=1692

[crazy muddin niner boy]

Check your Reed between Carb and cylinder most likely r worn and letting a little much gas into cylinder, ,,,buy new reeds or Reed cage and all

[BadMoonRacing]

Definatly an air leak I know these Quadracers inside and out. If you have an old Zuki QR, you need to be e member here http://www.quadracerhq.com/forum/forum.php all the info you will ever need for 250 and 500 QR's and many other Zuki's to. A great buncha guys always helpful and lottsa parts for sale. If you need a service manual PDF copy I can email you on if you want PM me.

[fast78ford]

piece of ... no q racer is worth having unless its a zilla

[Merc09]

Hey i have a quad racer. If you want a parts quad its 150$ you can find it in the shop and swap its under QUADZILLA!!! when I posted it that's what I thought it was lol.