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Discussion Starter · #1 ·
Here are some pics of 2 bike i recently grabbed. i paid 2350 for 3 bikes.

a 72 gt550

a 74 gt 550

a 73 gt750.

the 750 runs kinda, the 550 from 74 ran recently and the 72 gt550 i sold for 350 as a parts bike because it was just a frame and motor. it also had the gas tank and a few other thing. i could have gotten 525 from ebay but i didnt want to mess with that.

here are soem pics.
















i am good at fixing bikes but i really dont want to play guess and check with these. so because they are so close to running well i decided to take them both down to the local dirt bike shop (they are more of a two stroke only shop) and let them jet, tune and diagnose any issues. it should cost about 300 for both. pending their diagnosis i will either sell the 550 or keep them both. either way life is great right now. cant wait to get rid of the gow aweful fairing on the 750 and get these things cafe/fighter-ed out.
 

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Discussion Starter · #4 ·
thanks guys. any one know why a cylinder would quit firing? theres no spark, what should i check first? i put a new plug in it but there was no spark still.
 

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BLACK BELT
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Okay. My first piece of advice is to decide what you're gonna keep, and buy a service manual for it.

Paying someone to tune your bikes is okay the first time, but you don't learn shit by letting someone else do it.

IMO, you need to read about how your bike works and know the parts and what they do. Many brothers on this site will help you and give you great advice, but will expect you to do your part, too.

Two strokes are simple engines to understand, so don't be intimidated. There's also something special about two-strokes. Something raw and wild that most fighter people appreciate.

You've come to the right place, if you want to turn those beat up bikes into something to be proud of.
 

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:robssmilie: goodonya now go stink up tha locals :D


Keepem both there gettin rare now and will be worth a good bit down tha line .

As fer tha spark lost ,simple on tha 550 three coils and three point and three condensers ,cheap to replace and ya know which set it is .GL and ride safe
 

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Discussion Starter · #10 ·
dose anyone know if the coil on the 550 is interchangeable with the coil for the 750? im thinking i can just take parts from the 550 till im ready to fully mod it. that way i have a complete running bike for daily use.
 

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VAG Commander
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Welcome, nice smokers!

I look forward to seeing a build thread in the future... when you do create said build thread please use something nicer than a potato to take pictures so we can all be more envious!
 

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watches you sleep.
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Welcome to Custom Fighters. Very cool bikes ya got. Good to hear you're gonna be fixing them up. They deserve it. As for the coils, as long as they look about the same then they SHOULD be interchangeable. I don't see any harm in swapping them out. Good luck.
 

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Discussion Starter · #14 ·
the potatoe was my brother lol. i was at work and asked him to take pics with the shitty i phone cam. he did. i was like "dude i cant make friends on line with these!" any way i wil cross refrence that link. charging the battery to the 750 now and will be swaping parts this coming week.
 

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Discussion Starter · #15 ·
so i found that the coil was bad going to the dead cyl.

i also found that there was a dead coil on the 550 coil so i am swaping out a dead one for a good one. the screws were rusted tight so i am in the process of drilling them out. i will be replacing phillips heads for metric hex bolts.

heres the progress on the coils and bikes.

















 

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Welcome to CF aslsmm! You have definately gotten our attention......very fortunate find! ;)
 

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Discussion Starter · #18 ·
i got all the coils and tested them. all 3 from the 750 and 550 work. so i traced the wires back and there is no break in the wire. the guy said he had the points replaced and they all look new.

so my question is, can i test the points and condensors? the right cyl isnt firing. but the right cyl coil is fine.
if i have to replace the points and condensors im thinking abut doing an electronic ignition instead. any advice?
 

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Discussion Starter · #19 ·
let me clarify, the right cyl isnt getting spark.

from left to right we will label them 1,2 and 3.

coil 3 dosnt spark when pluged into the proper plug, but when plugged into cyl 1 or 2 it sparks great.

thats why i think its point or condensor 3 but i can i make sure thats it?
 
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