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Author Topic: My First 88 LT500 Build  (Read 38460 times)

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Re: My First 88 LT500 Build
« Reply #675 on: October 16, 2013, 06:39:19 pm »
It slows down gets chuggy I should've shot another video after I turned it in. Thing is with my custom cable I had made for the dual gasser I think it's making my slide hang up or it's position to stay inconsistent. That or I have an air leak I still need to leak down test it.

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Re: My First 88 LT500 Build
« Reply #676 on: October 16, 2013, 06:44:15 pm »
Try very very small adjusts till it settles down. Make sure the motor is warmed up. I think its pretty close.

Any further temperature drops and it will become worse.
Ain't ever seen it......but I have heard it.

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Re: My First 88 LT500 Build
« Reply #677 on: October 16, 2013, 07:08:25 pm »
So as the temp drops I need to adjust the air screw? or fatten the pilot?

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Re: My First 88 LT500 Build
« Reply #678 on: October 16, 2013, 07:13:26 pm »
c'mon DerriCk, YOU CAN DO EET!

MYYYYYYY BAD,,,, FoRgOt A c In YoUr NaMe,,,, ohhhhh so scared!!  --> --> P*
1976 Yamaha TT500
1979 Yamaha TT500
1980 Yamaha TT500
1985 Yamaha YTZ250
1985 Yamaha YTZ250
1985 Honda ATC350X
1985.5 Yamaha YTZ250
1987 Suzuki LT265R
1988 Suzuki LT250R
2002 Honda CR85RB
2005 Honda TRX450R
2007 Honda TRX450ER

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Re: My First 88 LT500 Build
« Reply #679 on: October 16, 2013, 07:13:56 pm »
Chuckie thanks

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Re: My First 88 LT500 Build
« Reply #680 on: October 16, 2013, 07:24:18 pm »
my 250 was still a little lean with the FTZ on it but it didnt hang near as bad as yours is O.O
1976 Yamaha TT500
1979 Yamaha TT500
1980 Yamaha TT500
1985 Yamaha YTZ250
1985 Yamaha YTZ250
1985 Honda ATC350X
1985.5 Yamaha YTZ250
1987 Suzuki LT265R
1988 Suzuki LT250R
2002 Honda CR85RB
2005 Honda TRX450R
2007 Honda TRX450ER

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Re: My First 88 LT500 Build
« Reply #681 on: October 16, 2013, 08:07:04 pm »
Just ordered a stock throttle cable. Thinking I have an air leak somewhere though so gonna do a leak down test. Hey Matt what size freeze plug and stuff did you use to make your leak down tester?

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Re: My First 88 LT500 Build
« Reply #682 on: October 16, 2013, 08:44:45 pm »
I will check tomorrow for you sir.

Go Tigers!!!
Ain't ever seen it......but I have heard it.

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Re: My First 88 LT500 Build
« Reply #683 on: October 16, 2013, 08:52:04 pm »
Go tigers? I hate baseball you must mean go Bengals! Lol coming to Detroit to wreck the lions on Sunday!!

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Re: My First 88 LT500 Build
« Reply #684 on: October 17, 2013, 08:24:48 am »
Also forgot to turn my damn phone sideways again.




We can tolerate tuning inadequacies and many other things but this ^^^^ is not acceptable!!  ::)

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Re: My First 88 LT500 Build
« Reply #685 on: October 17, 2013, 08:48:46 am »
My extreme apologies Nopick! Lol

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Re: My First 88 LT500 Build
« Reply #686 on: October 17, 2013, 11:16:10 am »
So as the temp drops I need to adjust the air screw? or fatten the pilot?

you'll know what to do based on how she idles.  every couple of months i have to adjust my air screw a tad 1 way or another.

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Re: My First 88 LT500 Build
« Reply #687 on: October 17, 2013, 11:19:42 am »
I'm gonna be putting my airbox on and an outerwears on my K&N I wonder if that's going to make a big difference in my tuning. Also does anybody happen to have an extra idle adjuster thumb screw spring laying around they might wanna drop in the mail to me??

Going to clay county Kentucky for some riding second weekend in November (was able to talk my dad and his buddies to go then instead of after thanksgiving so I don't have to miss The Game) provided I can get a fresh top end on my dads kfx400 over the next three weeks. Got all the parts for it from Jason yesterday!

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Re: My First 88 LT500 Build
« Reply #688 on: October 17, 2013, 06:13:06 pm »
Put the airbox on found out I have the air screw only 3/4 of the way out to get it to idle like it does in the video. Still hangs when reved. Adding the airbox made me have to turn the air screw out 1/4 turn. It was also about 5-10 degrees colder out tonight then any of my other tuning adventures.



Finally turned my damn phone sideways too!!

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Re: My First 88 LT500 Build
« Reply #689 on: October 17, 2013, 09:49:18 pm »
Sounds like it settles down pretty good. How's your plug reading?

 +k2
87 HPR LT500
04 Roll LOBO II TRX250R
06 LTR450
87 LT500
85 & 86 LT250
86 & 87 TRX250R
07 & 09 Husqvarna TE450
00 CR125R

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Re: My First 88 LT500 Build
« Reply #690 on: October 17, 2013, 11:06:04 pm »
Suuuuuuper close!!!!! Still a hair lean IMO (personally I'd rather be a bit rich than a bit lean)  but you are REALLY close now!!
1976 Yamaha TT500
1979 Yamaha TT500
1980 Yamaha TT500
1985 Yamaha YTZ250
1985 Yamaha YTZ250
1985 Honda ATC350X
1985.5 Yamaha YTZ250
1987 Suzuki LT265R
1988 Suzuki LT250R
2002 Honda CR85RB
2005 Honda TRX450R
2007 Honda TRX450ER

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Re: My First 88 LT500 Build
« Reply #691 on: October 18, 2013, 03:28:55 am »
Well I'm less than a full turn out on the air screw and at a 27.5 pilot so should I bump up to a 30 pilot jet otherwise I'll be half a turn out or less to richin it up. With the 25 pilot it wouldn't idle like this unless I had the air screw all the way in then it would stall.

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Re: My First 88 LT500 Build
« Reply #692 on: October 18, 2013, 06:51:44 am »
If your needle clip is in the middle I'd move the clip down one... If the clip is already on the fourth or fifth clip down I'd increase the pilot jet one size.
87 HPR LT500
04 Roll LOBO II TRX250R
06 LTR450
87 LT500
85 & 86 LT250
86 & 87 TRX250R
07 & 09 Husqvarna TE450
00 CR125R

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Re: My First 88 LT500 Build
« Reply #693 on: October 18, 2013, 08:24:18 am »
looks like you're getting a good handle on tuning.  Almost there.

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Re: My First 88 LT500 Build
« Reply #694 on: October 18, 2013, 08:35:11 am »
All that tuning, you need to ride it a bit with some load on motor, make sure the rings get settled in good.

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Re: My First 88 LT500 Build
« Reply #695 on: October 18, 2013, 09:05:46 am »
Oh I've taken it on a couple spins around our lot only gotten into second once and haven't had room to really open it up yet. Front end on pavement might as well be permanently airborne. Gonna drop the needle clip by drop I mean move it from the second clip position to the third and get the plastics on and cut off the dumbo ears (planning on buying a new set of oem fronts and modifying them like Rider414's Shirley to fit around to Q pipe). Then it's out to the farm where we have a 3/4 mile private dead end road and about 10 acres to play on some flat and some hills.

Also have a stock cable on the way working on getting my stock suzuki throttle polished up. Also have a yellow outerwears water repellant pre filter on the way too.

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Re: My First 88 LT500 Build
« Reply #696 on: October 18, 2013, 09:28:40 am »
Dude it sounds great................much much better. Fine tune with the air screw for throttle response.

Now you can work on the other jetting circuits. I would see how it runs off idle through the mid-range. Bring it "on the pipe" abit. See how it transitions.

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Re: My First 88 LT500 Build
« Reply #697 on: October 18, 2013, 09:49:18 am »
Rider it transitions the front tires into the air! Lol gonna pull the slide and drop the needle tonight or tomorrow night. Just realized I don't have a flywheel/stator cover so unless my CF one is done I won't be ripping at the farm this weekend. Oh and also need to bleed or do something with my rear caliper almost went into traffic last night cause I have almost zero rear brakes. Just ordered a set of LTR450 pegs apparently a little love opening one of the mounting holes by a mm and the bolt right up. Got a nice black set for $22.00.

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Re: My First 88 LT500 Build
« Reply #698 on: October 18, 2013, 10:10:12 am »
If your needle clip is in the middle I'd move the clip down one... If the clip is already on the fourth or fifth clip down I'd increase the pilot jet one size.

The clip position does not effect the pilot jet size or the air screw setting.  The effects of moving the clip starts to show up in the 1/4 to 1/2 throttle opening range.  The start of the taper on most needles is not above the top of the needle jet orifice until 1/4 to 1/2 throttle opening.

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Re: My First 88 LT500 Build
« Reply #699 on: October 18, 2013, 10:17:51 am »
So Jerry is having the air screw only 1/2 to 3/4 of a turn out ok, or should I bump the pilot to get that air screw above 1 turn out? Also is dropping the clip (moving the needle up) going to help resolve my hanging when reved and get it back to idle smoother and quicker? Thanks for taking time to chime in.

 

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