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Author Topic: Q2W's 1987 LT80 Rebuild Thread  (Read 2357 times)

Offline Q2W

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Q2W's 1987 LT80 Rebuild Thread
« on: March 20, 2015, 07:20:51 pm »
So i picked up my son an LT80 last year for $100.

I got a killer deal on it.  The quad looks great but is missing a few items and coil/CDI is dead.

Long story short, the owner sent it to a shop for repair (coil/CDI).  A year later, after not getting any return phone calls, he went to pick it up and found out the builder recently went to jail.  He went in and grabbed everything he could find but was unable to find the key and along with various other parts - mostly the cooling system.

after getting it home and taking it completely apart, i found the CDI is not likely dead just that the wires a broken right at the unit itself.  Think i'll go ahead and get a new CDI though.

Other than the CDI, the top end had a little wear and the piston was in backwards.  Gonna go ahead and bore it up to the next size. 

I plan on painting, hydro-dipping, new wheels and low profile tires - the balloons that are on it make it super top heavy, etc etc.  Total rebuild.

The plastics are in great shape except the gas tank which is faded really bad.   Ill post pics along the way. 

Mr.  Moore, i hope you're on standby. haha

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Offline Gillio

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #1 on: March 20, 2015, 07:39:52 pm »
Are you new here? where are the pics? lol. Those 80s are fun.
92 LT250R- Bartlett racing prototype big bore. Wide, Low,  and studded

91 LT250R Mickey Thompson stadium racer

87 LT500R- Mostly stock

89 LT500R IceZilla, mods TBA

Offline LT80

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #2 on: March 21, 2015, 05:52:56 am »
After finding out how much the CDI's are, the one you have may be good. :)
So tell me about this backwards piston. Which way for the arrow?
I'll be around.  (Y)

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #3 on: March 23, 2015, 06:42:16 am »
Yea, im not excited about buying a new $180 CDI. 

I was thinking about opening the CDI and reconnecting the wires.  May as well if i plan to get a new one anyway, right?

Yea, the arrow on the piston was pointing to the rear.

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #4 on: March 23, 2015, 06:47:21 am »
Are you new here? where are the pics? lol. Those 80s are fun.

what was i thinking?



Offline Yagerzzz

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #5 on: March 23, 2015, 07:58:20 am »
Good looking little 80 you've got there. I'm partial to the yellow and blue ones of '87 and '88 myself. There are a few advantages to those first two years also that some people don't realize (aside from being the best looking :) ). I have an '87 also, but I currently have '88 rear plastic on it because I liked those decals a little more.

BTW, your piston was installed correctly. The arrow should point toward the exhaust. On most engines, this is forward, but not on the LT80. DO NOT point the arrow forward or you risk damaging your cylinder!

yagerzzz

Offline Yagerzzz

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #6 on: March 23, 2015, 08:37:29 am »
Also, my gas tank was similar to yours when I started. I buffed it with a fine sanding disk and an air grinder. That got the faded white out. Then i used finer and finer disks until the sanding marks were nearly gone. I then buffed it with a buffing wheel and got it looking nearly new again.

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #7 on: March 24, 2015, 07:30:26 am »
I thought as much about the piston after i mic'd it last night.  Stock bore.   The motor has never been into.

I was thinking about hydo-dipping the tank either black or a carbon fiber look.


Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #8 on: March 25, 2015, 11:59:16 am »
do any hubs swap with the lt80's?

Offline LT80

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #9 on: March 25, 2015, 02:49:21 pm »
Kasea hubs will fit on the front.

Offline Yagerzzz

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #10 on: March 26, 2015, 07:57:39 am »
Jack, are there any advantages to the Kasea hubs on the front? Do the brakes connect up the same way?

Also, were there ever any aftermarket aluminum rear hubs made for these bad boys?

Sorry to hijack your thread Q2W.

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #11 on: March 26, 2015, 09:11:03 am »
no worries, any info is great.  ask away.

Offline LT80

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #12 on: March 26, 2015, 10:28:46 am »
No advantage to the Kasea hubs unless you have or are getting 4 hole rims.
No brake problems. The brakes are on the backing plates.
It's been a while but I think the backing plates/spindles can interchange. Anyone thinking of that should research well first.
No aftermarket rear hubs that I know of.
:)

Offline GrkGuy

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #13 on: March 30, 2015, 04:42:20 pm »
Qtw do you have a extra key assy. For the 80.
life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sidays totally worn out shouting "HOLY SH*T...WHAT A RIDE!"

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #14 on: March 31, 2015, 06:23:46 am »
I had to get a new one myself.  Paid like 7 bucks for a new one on Ebay.

Offline GrkGuy

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #15 on: March 31, 2015, 09:07:32 am »
Ok thanks guess I gotta look on there.
I use a screw driver right now, lol
life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sidays totally worn out shouting "HOLY SH*T...WHAT A RIDE!"

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #16 on: March 31, 2015, 09:08:43 am »
lol, they are easy enough to hot wire... so i've heard...

Offline GrkGuy

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #17 on: March 31, 2015, 10:08:38 am »
I didn't tear into it yet, but I was gonna take key off my bike to see if it will fit. 
I need to get a chain tensioner also, when you rev bike out you can hear chain slap on gaurd.
Have you checked the main motor mount bolts yet, ours bike had a wobble, well you can sit on it
and wiggle your butt and bike would move, after I cranked on frame and motor mount bolts bike felt
tight and there was not all that movement anymore. But that little bike sure does run good. It feels faster than the
DS 90 we have but the DS has more bottom end. And is in way better shape than the 80,

I really need to let jack (lt80) get his hands on it.
life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sidays totally worn out shouting "HOLY SH*T...WHAT A RIDE!"

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #18 on: March 31, 2015, 11:49:16 am »
It's in pieces.  My son and I completely took it apart.  Sand blasting and painting most everything.  Gonna mod the foot pegs so they can be moved without pulling the motor too.

I remember it being wobbly though.  Just thought the bushing and bearing were all shot.

Offline Maxxh2o

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #19 on: March 31, 2015, 06:35:10 pm »
I found that powder coating the wheels and doing the wheel flip mod with flush stems was a great and cheap mod.  Added quite a bit of width.

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #20 on: April 01, 2015, 06:28:38 am »
My plan was to get new wheels but if the wheel flip mod adds more width, i'd rather do that.  Was wanting blacked out wheels anyway.

Offline LT500Kid

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #21 on: April 01, 2015, 04:35:32 pm »
http://detroit.craigslist.org/okl/snw/4933968147.html

Speaking of lt80. Saw this. Way overpriced but damn is it clean

Offline Q2W

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #22 on: April 01, 2015, 05:28:04 pm »
damn that is nice!  but yea, way overpriced.  looks like he doesnt really want to sell it but if someone is willing to pay 2.5k, then hell yea.

I got the elaborate cooling system in the mail the other day.  Thought i got a good deal.  Entire thing plus fan for 60.  Also got the carb rebuild kit.    My plan is to order OEM gaskets once i get a materials list for all the bolts and such.  Will be ordering a 50.25mm piston soon so i can go ahead and have the cylinder bored.

Just had to pay taxes to the man.  So i may wait til next week when i get paid again.  Having gutters, roof, and A/C maintenance done next week too.

Any other mods you guys know about that are simple;  Please let me know!

Thanks for all the info so far.

Offline GrkGuy

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #23 on: April 01, 2015, 10:33:17 pm »
life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sidays totally worn out shouting "HOLY SH*T...WHAT A RIDE!"

Offline LT500Kid

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Re: Q2W's 1987 LT80 Rebuild Thread
« Reply #24 on: April 02, 2015, 03:47:21 am »
That is in nice shape john. How far is that from you? That would be perfect for my youngest.

 

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