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Old 03-22-2012, 09:04 PM   #1
invision
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TTR-125 Barn Find Issues

I got a free barn-find TTR-125 w/electric start a few days ago.

It's missing pretty much all of the bolts and screws for plastics, including the ones for the gas tank.
PO lost the hose that goes from the airbox to the carb.
PO ALSO removed the electric start and the choke is missing altogether.
And I think the best abuse of a bike by the PO that I've ever seen - the petcock was routed into the air vent on the carb, and the fuel line was vented to open air.

So, first thing first was draining and filling up with new gas. Bike wouldn't start.

Checked for spark, and it's there.

Decided to tear the carb down, and I can say after owning around 10 different motorcycles, this one has the worst carb i've ever seen. Cleaned it out, and stuck it back on.
Kick it over, still won't start.

So I did what every self-respecting kewrs laight drinkin' American would do and shot a ton of start fluid into the carb. Still nothing, but now it backfires up into the airbox pretty violently.

I'm thinking the carb is just toast, so I'm trying to browse ebay to find another one. What I'm worried about is the PO's electric start delete. I noticed that the starter is still on the bike, but I can't tell how he took the ignition out - no wires or anything, it's just gone. Would the bike still get spark when it's kicked over if the PO messed that mod up? Also if someone could give me a list of things to start tracking down on this bike I'd appreciate it.

WjkE0l
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Old 03-23-2012, 07:24 AM   #2
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If it's like a honda 50, then you can take of the ignition key switch fairly easily and bypass it. You can also very easily bypass the kill switch. The bike will still get spark because it's all just been bypassed.
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Old 03-23-2012, 09:06 AM   #3
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Quote:
Originally Posted by invision View Post
I got a free barn-find TTR-125 w/electric start a few days ago.

It's missing pretty much all of the bolts and screws for plastics, including the ones for the gas tank.
PO lost the hose that goes from the airbox to the carb.
PO ALSO removed the electric start and the choke is missing altogether.
And I think the best abuse of a bike by the PO that I've ever seen - the petcock was routed into the air vent on the carb, and the fuel line was vented to open air.

So, first thing first was draining and filling up with new gas. Bike wouldn't start.

Checked for spark, and it's there.
Decided to tear the carb down, and I can say after owning around 10 different motorcycles, this one has the worst carb i've ever seen. Cleaned it out, and stuck it back on.
Kick it over, still won't start.

So I did what every self-respecting kewrs laight drinkin' American would do and shot a ton of start fluid into the carb. Still nothing, but now it backfires up into the airbox pretty violently.

I'm thinking the carb is just toast, so I'm trying to browse ebay to find another one. What I'm worried about is the PO's electric start delete. I noticed that the starter is still on the bike, but I can't tell how he took the ignition out - no wires or anything, it's just gone. Would the bike still get spark when it's kicked over if the PO messed that mod up? Also if someone could give me a list of things to start tracking down on this bike I'd appreciate it.

WjkE0l


Above I see you saying it has saprk, and in the section below I see you asking if it will spark? If you have spark and spray either into the intake and are not getting fire, I would check compression.... Also you mentioned it is backfiring into the carb (which means you would be getting fire) I would still check the compression.... Just thoughts of what my next step would be
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Old 03-23-2012, 09:07 AM   #4
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Quote:
Originally Posted by invision View Post
I got a free barn-find TTR-125 w/electric start a few days ago.

It's missing pretty much all of the bolts and screws for plastics, including the ones for the gas tank.
PO lost the hose that goes from the airbox to the carb.
PO ALSO removed the electric start and the choke is missing altogether.
And I think the best abuse of a bike by the PO that I've ever seen - the petcock was routed into the air vent on the carb, and the fuel line was vented to open air.

So, first thing first was draining and filling up with new gas. Bike wouldn't start.

Checked for spark, and it's there.

Decided to tear the carb down, and I can say after owning around 10 different motorcycles, this one has the worst carb i've ever seen. Cleaned it out, and stuck it back on.
Kick it over, still won't start.

So I did what every self-respecting kewrs laight drinkin' American would do and shot a ton of start fluid into the carb. Still nothing, but now it backfires up into the airbox pretty violently.

I'm thinking the carb is just toast, so I'm trying to browse ebay to find another one. What I'm worried about is the PO's electric start delete. I noticed that the starter is still on the bike, but I can't tell how he took the ignition out - no wires or anything, it's just gone. Would the bike still get spark when it's kicked over if the PO messed that mod up? Also if someone could give me a list of things to start tracking down on this bike I'd appreciate it.

WjkE0l
NICE K4 in the back! Oh and good luck with this... I am starting to get the Motard/Dirtbike itch pretty bad lately.
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Old 03-23-2012, 09:10 AM   #5
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I'm guessing bad compression....I have two bikes in my garage right now that appear to both be getting spark and I've been through the carbs twice. Obviously getting fuel as the bowls are filling up quite nicely. Next step is new top ends after inspecting the heads.
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Old 03-25-2012, 01:50 PM   #6
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barn find issues

hey, I agree with these guys to check comp.as we all know you need 3 things to run fuel, spark, and compression. well you said you have spark, you have fuel or atleast a small amount when you sprayed starting fluid into it and looking at the pic. the bike seems to be in good shape if i had to guess i would say the comp. is good enough to run, but becouse it back fires through the carb you might not be getting the spark at the correct time check the pick-ups (your ignition timing)
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Old 04-02-2012, 01:54 AM   #7
invision
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Finally got around to doing the valves and checking the timing, and everything seems to be in order. I'm guessing it's compression, but I need a gauge to verify it. If it's low compression would I just need to replace rings?
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Old 04-02-2012, 06:18 AM   #8
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barn find

if you have poor compression, it could be several things, such as rings ,broken piston,burned hole in piston,head gasket, cracked head, or A valve problem so don't jump the gun. Auto Zone, or o-reilly has compression guages that they loan (well almost you put a deposite down equal to the cost of the tool-then its refunded when you bring it back) that motor should run with as little as 85-90 pounds ideally you should have 120-125 p.s.i.
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Old 04-02-2012, 06:30 AM   #9
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Question barn find

hey its me again what exactly did you mean when you said "I finally got around to doing the valves and checking the timing" and how did you check your timing??? Also did you ever get your carb./petcock fuel and vent hoses straightened out?
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Old 04-02-2012, 02:41 PM   #10
invision
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Another update

It accidentally got left outside last night without a carburetor so I woke up this morning to find that it's been raining and it looks like a bunch of water found it's way into the engine. Awesome :(
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Old 04-03-2012, 10:43 PM   #11
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Invision, if you get sick of with it let me know, I've been wanting another dirt bike since I got passed my cancer (in remission). barter, trade, sell, something???????? I'm A paint & body man by trade, been away from it for A while, but its like riding A bike.My dad, Chainsaw Chuck, does residential tree service. Just A thought, let me know if interested.
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