anyone a suzi motorcycle expert?

autofreak44

autofreak44

Active Member
can anyone tell me a little bit about this cycle, we just bought it off a friend for 50 bucks and it runs GREAT... untill it ran out of gas lol



wondering aproximate year, model, and how many cc the engine is. also is the carb a 1 needle or 2... havent found the 2nd one if there is one
what should the gas/oil ratio be? (its a 2 stroke)
 
reefforbrains

reefforbrains

Active Member
LOL and you guys call ME old school!!!
What probably happened is you overheated the poor thing with the wrong mix.
Possible you burnt the piston but even with worst case scenario its a very easy rebuild since 2 strokes are like working on weedeaters....
Especialy in two strokes when you lean out the carb you get tremendous power but you lose the extra unburt fuel that in 2 stroke applications works to cool and lubricate the internals.
When the bike WAS running did it have the faint trail of blue smoke typical of 2 stroke motors? If NOT then I would bet you burned the poor little thing up.
If everything was running as normal and then you let it run itself dry then its possible you just pulled some small partical from the last bit of the tank that clogged your needle.
1- does the bike have a fuel filter? or two if one is inside the carb itself?
2- did the bike have the faint white/blue smoke trail when it WAS running?
3- when you played with the carb are you sure you didnt lean it out too much?
How many turns from closed is the screw currently at? small 1/8 turns can make a large difference in lag time for it to run through the RPM band.
There SHOULD always be two adjustment screws on any given carb for high speed and low speed idle settings. Some of the older Mikuni Carbs were almost preset so first make sure of what model you have. The bike should have a frame tag on it up at the top of the frame telling you the year and displacement specs for the bike.
Just another silly thing to poke at is where the carb goes mounts to the intake. It is normally just slip fit with a bushing and a hose clamp. When things sit they have a habit of leaking and even small leaks between the carb and the intake will make the bike an ether baby for wanting to fire up again when cold.
Look at the frame tag and get more info about the specs and then I am sure it is an easy fix. Just knowing where to start always helps.
Sorry I am no expert but will help any way I can.
-RFB
 
autofreak44

autofreak44

Active Member
Originally Posted by ReefForBrains
LOL and you guys call ME old school!!!
What probably happened is you overheated the poor thing with the wrong mix.
Possible you burnt the piston but even with worst case scenario its a very easy rebuild since 2 strokes are like working on weedeaters....
Especialy in two strokes when you lean out the carb you get tremendous power but you lose the extra unburt fuel that in 2 stroke applications works to cool and lubricate the internals.
When the bike WAS running did it have the faint trail of blue smoke typical of 2 stroke motors? If NOT then I would bet you burned the poor little thing up.
If everything was running as normal and then you let it run itself dry then its possible you just pulled some small partical from the last bit of the tank that clogged your needle.
1- does the bike have a fuel filter? or two if one is inside the carb itself?
2- did the bike have the faint white/blue smoke trail when it WAS running?
3- when you played with the carb are you sure you didnt lean it out too much?
How many turns from closed is the screw currently at? small 1/8 turns can make a large difference in lag time for it to run through the RPM band.
There SHOULD always be two adjustment screws on any given carb for high speed and low speed idle settings. Some of the older Mikuni Carbs were almost preset so first make sure of what model you have. The bike should have a frame tag on it up at the top of the frame telling you the year and displacement specs for the bike.
Just another silly thing to poke at is where the carb goes mounts to the intake. It is normally just slip fit with a bushing and a hose clamp. When things sit they have a habit of leaking and even small leaks between the carb and the intake will make the bike an ether baby for wanting to fire up again when cold.
Look at the frame tag and get more info about the specs and then I am sure it is an easy fix. Just knowing where to start always helps.
Sorry I am no expert but will help any way I can.
-RFB
well actualy we made it realy rich (some serious blue smoke)and were in the process of tuning it when it ran outa gas. it could be running better so were gonna get some plugs and gas and get it tuned right...
my brother is going to the suzuki dealer today to ask about fuel mix ratios and i have sparkplug duty... it is running fine and all i was just wondering if anyone knew the year and model... we searched the frame for any indication and all we found was the VIN number... no model, no cc ect.
thanks for all the help tho, when something does go wrong i guess i will check all that
 
reefforbrains

reefforbrains

Active Member
Smokin deal at 50 bucks.
If its running a bit rich, then you likley just fouled the plug. Since it was running, it could continue but once cold the plug is probably black and covered with tar.
A nice new plug should crank her right up. When searching for a good plug in a two stroke you might even bump to the next hotter plug since the bike is older. And keep some spares.
Spark plugs are cheap, around 5 bucks should get you a nice plug so dont go monkeying with cleaning or fartin around with used plugs trying to save a buck. If you want to go with the cheapo autolite I am sure it will still run great.
The electrode can only be gapped so many times before it just wont hold. And even worse is when people sand and file and play with the plugs untill the electrode falls off INSIDE the Combustion chamber...........Prevention by just getting a new plug vrs a whole new rebuild since your tiny electrode ruined your valve-train and piston crown.
Good luck with the bike. And ride safe.
 
S

sudc

Guest
Holy old bike! That made me feel young again.
I was VERY into dirtbikes in the early 80's and i'd guess that that bike is at least 25 years old. Doesn't look like a 2 stroke but I could be wrong. Not sure when they started making their 2 stroke rf's but that looks like their 4 stroke counterpart(cant remember the name) from the early 80's. I could be wrong because of the age but since it isn't water cooled and doesn't have disk brakes, its probably a 4 stroke. If you wanna be sure, just floor the gas. If its a 4 stroke, you will take off fast. If its a 2 stroke, the powerband will kick in and most likely leave you on the ground while it rides off in a wheelie

As far as cc's, its hard to tell without a person standing next to it for reference but i'd guess either 100 or 200 cc'c. I cant remember what versions suzuki made in 4 strokes but Honda made 100 and 200 cc 4 strokes and i believe so did Kawasaki, yamaha and suzuki.
If that thing runs, you got the deal of a lifetime for $50!
 
autofreak44

autofreak44

Active Member
yeah it runs

its pretty funny... we keep telling our mom that we are going to sell it and just have to tune it first but we havent touched anything besides gas and plugs... and we still keep riding it lol
fun stuff
 
tne1cancme

tne1cancme

Member
I'm thinking it's a '77-'78. Frame and pipe layout appear to be RM, tank may be off a TS. It's hard to tell from pic but it looks to me like either a 80cc or maybe a 100cc. Definitely a 2 stroke, run oil @ 32:1 or 40:1, really depends on quality of oil you run. Run a good motorcycle 2 stroke oil and make sure you have a visible stream of blue smoke out of the pipe. Someone already mentioned plugs and I'll have to agree that quality plugs are better than trying to get by with a lawnmower plug(champion).
Have fun and ride safe!

I always have to say the following line.
IF you have a ten dollar head, wear a ten dollar helmet. and if you're not wearing one what's that say you're worth.
 
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