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Recent Posts

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1
LT500R - Engine / Re: Wiseco piston to Cylinder Clearance Question
« Last post by Rainman56 on July 27, 2021, 12:56:42 pm »
Has there been any new developments on Pistons for the 500's??? I suspect not beings the machines are so old but thought I'd ask :)
2
LT500 - General Discussion / Re: Pipe mounts?
« Last post by Q2W on July 23, 2021, 11:23:38 am »
OK, that goes with what the seller of the carb said.
Is yours a big reed cylinder, or '88-up? What mix ratio?

Small reed.  32:1
3
LT500 - General Discussion / Re: Pipe mounts?
« Last post by Holeshot 500 on July 22, 2021, 07:40:33 am »
OK, that goes with what the seller of the carb said.
Is yours a big reed cylinder, or '88-up? What mix ratio?
4
LT500 - General Discussion / Re: Pipe mounts?
« Last post by Q2W on July 22, 2021, 06:25:08 am »
Yea but changing to the HPR19 pipe didnt seem to affect anything but the main.  Pilot and needle were at the same spot with the Q pipe.

Specs:  ~800 elevation, no airbox/exposed 9" K&N airfilter, Mild Dune port w/reshaped dome and squish corrected, V2 reeds.
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LT500 - General Discussion / Re: Pipe mounts?
« Last post by Holeshot 500 on July 21, 2021, 09:38:33 am »
So you could go one leaner on your needle jet (say R-2 to an R-0) and get your needle back to the middle to have some adjustability...
Cool though. That confirms I'll be in a safe zone to start.
Thanks again!  (Y)
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LT500 - General Discussion / Re: Pipe mounts?
« Last post by Q2W on July 21, 2021, 09:02:15 am »
yea, i have the 88+ carb bored.  My pilot is a 30 or 32.5.  Stock needle with the clip at the very top.

My bike always loaded up in 1/4 - 3/4 throttle range.  Putting the clip at the top of the needle made a night and day difference in how my bike ran.
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LT500 - General Discussion / Re: Pipe mounts?
« Last post by Holeshot 500 on July 20, 2021, 02:22:55 pm »
Q2W, I just got this HPR '88 carb. The pilot is a 25, main is 600. The needle jet and needle are stock. Slide has slight mod on the intake side.
Is this close to what you're running?
I'm just confirming a good starting point; I would've thought the needle jet/needle would be changed somewhat.
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LT500 - General Discussion / Re: Pipe mounts?
« Last post by Holeshot 500 on July 16, 2021, 10:06:01 pm »
Thanks for the tip. I had figured on 2-3 sizes right off, but I'll go with you and go big.
I actually just found a Hall modified '88 carb that the seller was using with a 19 pipe. He threw in 5 jets in the 540- 580 range. Should be a safe starting point.
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LT500 - General Discussion / Re: Pipe mounts?
« Last post by Q2W on July 16, 2021, 12:11:31 pm »
I dont know what main jet you're using for the PT but get ready to increase that sucker!

Going from a modded Q1 pipe to the HPR19, my main jumped from 450 to 560 or 580. (bored stock carb 41.5mm)
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LT500 - General Discussion / Re: Pipe mounts?
« Last post by Holeshot 500 on July 09, 2021, 04:33:02 pm »
Yee ha!
My HPR-19 arrived today. What a bazooka! This thing is HUGE compared to my Paul Turner pipe.
Hope to get it tested tomorrow, though it's supposed to be over 103 for the next few days...
No test riding in shorts with this thing waiting to take skin grafts off yer leg...! Oh well, scars are nature's trophies, I always say. ;)  +k2
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