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LT500R - Engine / Re: Exhaust Silencer
« Last post by Bullock1 on Today at 12:25:42 pm »
FMF must of started making them again because they are starting to pop up on ebay and I purchased one.
Hybrids / Conversion - Engine / LT500R hybrid project
« Last post by Zukman88 on Today at 04:50:29 am »
So just lucked up in a basket case lt500r engine. Needs lots of care maybe a new crank and other internals. Im tryna figure out who makes or sells parts for these anymore. Is sb designs still around for hybrid mounts and im debating whether to use one of my lt250r frames or go try a ltr450 one. I know the engine is not an 87 it dont have the big intake. But your guys advice is very appreciated. If I can I wanna make it a hybrid drag quad but if I can't do that then I wanna make it a fun toy to rip around.
Items Wanted / Re: 1988-1990 LT500R Carburetor
« Last post by Yoyodyne on January 04, 2021, 03:29:28 pm »
I would just start fresh and buy a new Mikuni TM38 flatslide and convert to the proper jetting specs of 88 thru 90 models.  You can buy them new for around $120-150.
Be creative and make a plug that can be inserted into the exhaust port between the exhaust port window and the power valve hole in the floor of the exhaust port.  The LT 500 and LT 250 s are very difficult to get a meaningful pressure test until a perfect seal at this point is obtained.  Doing this will eliminate the usual leaks in the power valve components and resonating chamber in the front of the engine cases.  Small air leaks in these two areas will not affect the jetting or cause lean mixtures contrary to many arm chair tuners.   

Once you are absolutely sure the exhaust port plug is 100% leak proof, perform your leak test again after  inserting the transmission vent line into a bottle of water.  If the vent line blows bubbles, then you have a problem with the right crank seal, the case halves or a crack in the cases.  The OEM right side crank seal seldom fails unless the right main bearing fails and the bearing fragments ruin the  seal.

If the engine has experienced a broken piston skirt or lower connecting rod bearing failure sometime during it's life, the leak is probably in the case halves sealing surface or a crack somewhere in the engine cases.

Other common leak areas are at the rear of the cylinder next to the base nuts and the base gasket under the reed valve. 
LT500R - Engine / leakdown test-can hear air thru crankcase vent hose
« Last post by bigbird337 on January 02, 2021, 03:39:37 pm »
So I performed a leak down test on my 87 lt500r. I sprayed the entire outside of the motor no leaks. I can hear air thru the crankcase vent. I removed the clutch cover and listened and sprayed but there is no leak. I also removed the power valve because I couldnt get it to stop leaking and plugged it with a rubber plug. looking for directions on how to find the air leak.
LT500R - Engine / Re: Exhaust Silencer
« Last post by Q2W on December 29, 2020, 08:26:45 am »
I'd keep an eye on ebay or even FB marketplace.
Suzuki Quadracer HQ - General Discussion / Re: ISO oem 500 handlebars
« Last post by Q2W on December 29, 2020, 08:21:40 am »
it's a bot.  Instead of saying something random it just posts emojis.
Suzuki Quadracer HQ - Announcements / Re: Xmas 2020
« Last post by Q2W on December 29, 2020, 07:36:48 am »
Merry Christmas!
Suzuki Quadracer HQ - Announcements / Xmas 2020
« Last post by Andys92 on December 25, 2020, 12:12:54 pm »
LT250R - Engine / Re: 1987 LT250R has Wiseco Tecate 4 piston in it ??
« Last post by Fateofnorns on December 24, 2020, 12:43:48 pm »
According to what I'm seeing online, that is a 71.6mm piston. Are you sure it's an '87 engine? 1987 and up have 67mm std bores and '85 and '86 LT250Rs have 67mm std bores.
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