[Boostamante]

So i bought this 1972 Honda CB100 a while back for a couple hundred bucks. It ran a bit rough and had no lights wired up. Since then i have ran new gas in it and have managed to get her running somewhat decent ( might need a carb clean and new gaskets ). I see no evidence of a stator and it seems to only been used as a dirt bike in its past life. I would love to run lights and have at least a working brake light but cant figure out what the best way to go about it. Cant really tell if the engine is the original CB from another bike or a CL. ( the original exhaust ran High vs the low CB style ).

I have 2 options in my head, one is run a LED head light and wire up a small 12v battery or figure out they correct stator that will work with mentioned engine ( The isnt option isnt ideal but it works ). Currently the bike runs without a battery and has one wire coming out the left side that goes to a kill switch.

 

[XB33BSA]

xr motor the engine numbers will tell you
total waste of money to try to make it road leagal

 

[Boostamante]

xr motor the engine numbers will tell you
total waste of money to try to make it road leagal

Its considered a CB though as thats what the paperwork and the Serial says. Would that not be a reason to try and run it with lights? I get that it was a "dirtbike" motor, but could install a stator or perhaps and battery-less option is out there?

 

[XB33BSA]

you could buy a good used 175-250cc dualsport and actually ride
that thing wont be able to keep up with the cages anyway
they will run over,you... 15 year old girls on chinese scooters will run over you
,teach a pretty girl to ride ,teach some kids to ride learn to fucking ride yourself in the dirt its the best place to start
the parking lot and out at the river

how much do you weigh ? what size motor is it it ?it is cast in the cylinder
in fact the best thing is ride it like it is on the street when popo yanks it go get a bike that doesnt need everything

 

[Tanshanomi]

Cant really tell if the engine is the original CB from another bike or a CL. ( the original exhaust ran High vs the low CB style ).

The engine is a '78-later XR100 or XL100, which is not closely related to either the CB100 or CL100 engines made in 1972. The engine is actually a bored out version of what was originally sold as the XL75.

Currently the bike runs without a battery and has one wire coming out the left side that goes to a kill switch.

The lack of lights and battery suggest it's the XR version. 80cc and 100cc versions were made for many years and lasted until 2013 as the CRF100.

 

[Boostamante]

The engine is a '78-later XR100 or XL100, which is not closely related to either the CB100 or CL100 engines made in 1972. The engine is actually a bored out version of what was originally sold as the XL75.

View attachment 76665



The lack of lights and battery suggest it's the XR version. 80cc and 100cc versions were made for many years and lasted until 2013 as the CRF100.

View attachment 76657

This explains why the CB100 Exhaust didnt quite bolt up. HA! Hence the funky mod exhaust i did. If its a XR100 engine, how can i tell? engine is stamped with HE01 and cant seem to come up with anything using google

 

[Tanshanomi]

This explains why the CB100 Exhaust didnt quite bolt up. HA! Hence the funky mod exhaust i did. If its a XR100 engine, how can i tell? engine is stamped with HE01 and cant seem to come up with anything using google

I believe XR80s and XR100s were HE0's

1983 starts with HE0#E-52~
1984 starts with HE0#E-53~
1985 starts with HE0#E-54~
etc...

 

[XB33BSA]

This explains why the CB100 Exhaust didnt quite bolt up. HA! Hence the funky mod exhaust i did. If its a XR100 engine, how can i tell? engine is stamped with HE01 and cant seem to come up with anything using google

i already told you, the engine capacity, it is stamped into the fucking cylinder fucking barrel
it is actually fucking cast right in to the fucking aluminum
if you cant even follow simple things like where to see the capacity of the engine,how the fucking hell will you learn to fix your motorcycle over the interrnet ? thats the point nobody does and that is another reason not to own a fixer bike because you know nothing
read books if you want to repair a motorcycle
trying to get that machine worthy for street riding is pure insanity ,why not just flush your money, all of it ,down the toilet ?
ride it like it is until it breaks and then give it to some young 'un

 

[Tanshanomi]

i already told you, the engine capacity, it is stamped into the fucking cylinder fucking barrel
it is actually fucking cast right in to the fucking aluminum
if you cant even follow simple things like where to see the capacity of the engine,how the fucking hell will you learn to fix your motorcycle over the interrnet ? thats the point nobody does and that is another reason not to own a fixer bike because you know nothing
read books if you want to repair a motorcycle
trying to get that machine worthy for street riding is pure insanity ,why not just flush your money, all of it ,down the toilet ?
ride it like it is until it breaks and then give it to some young 'un

I think he was saying how could he tell if it was a CB100 or XR100 engine, which would both say "99cc" on the barrel.

 

[Boostamante]

i already told you, the engine capacity, it is stamped into the fucking cylinder fucking barrel
it is actually fucking cast right in to the fucking aluminum
if you cant even follow simple things like where to see the capacity of the engine,how the fucking hell will you learn to fix your motorcycle over the interrnet ? thats the point nobody does and that is another reason not to own a fixer bike because you know nothing
read books if you want to repair a motorcycle
trying to get that machine worthy for street riding is pure insanity ,why not just flush your money, all of it ,down the toilet ?
ride it like it is until it breaks and then give it to some young 'un

My, aren't you FUCKING helpful. Eat a bag of dicks you silly, angry fuckbag.

 

[Boostamante]

I think he was saying how could he tell if it was a CB100 or XR100 engine, which would both say "99cc" on the barrel.

I couldn't even find that. :/ It's ok, i appreciate your help. I'm not complaining much about the bike and it's condition since it only cost me 300 bucks. I just wanted to know what what engine it was since someone pointed out to me that it might have also been a CL100 motor. Seeing how it's the 1st moto i've ever owned / bought, i really just wanted to know what I was dealing with here. The XR seems to make the most sense seeing how it's set up. If nothing else, it will make a rad little dirt bike. Just be nice to set it up with a Headlight and a Tail Light.

 

[Boostamante]

I believe XR80s and XR100s were HE0's

1983 starts with HE0#E-52~
1984 starts with HE0#E-53~
1985 starts with HE0#E-54~
etc...

Seems I have the 80cc engine. At least i know that for sure now. Wanted to make sure so i could order a carb rebuild kit as it idles a little rough and am afarid to crack her open and find out i need to replace gaskets. Would the XR100 /CB100 carbs / kits be the same?

 

[Tanshanomi]

Seems I have the 80cc engine. At least i know that for sure now. Wanted to make sure so i could order a carb rebuild kit as it idles a little rough and am afarid to crack her open and find out i need to replace gaskets. Would the XR100 /CB100 carbs / kits be the same?

NOPE. Let's start with this: what's the full engine number?

 

[XB33BSA]

Seems I have the 80cc engine. At least i know that for sure now. Wanted to make sure so i could order a carb rebuild kit as it idles a little rough and am afarid to crack her open and find out i need to replace gaskets. Would the XR100 /CB100 carbs / kits be the same?

IF IT RUNS AND ONLY IDLES ROUGH YOU DO NOT NEED A CARB KIT or a gasket kit
first thing is put in a new sparkplug then a compresion test then a new sparkplug cap then check all wire connections clean all ground connections adjust valves and timing chain inspect airfilter clean if needed make sure the engine cannot suck in dirt
now this one is very important, not doing it could kill you
inspect the brake shoes especially the front
unless they look like brand new shoes ,get new ones
then read some books wtf is it about gaskets ? there are simple methods to check for air leaks which could mean you need a new gasket but it usually causes a high rough idle
get some books and study
i have a couple or 12 vintage motorcycle mechanics training books that you would learn so much from
studying one of them would do you good
shit i still learn stuff from them and i am 60
honda identifies parts using a 3 digit code as does yamaha and suzuki
the 3 digit code is marked on most parts it is not always the same as the vin first characters
Motorcycle Model Codes

 

[TrialsRider]

Fuk the lights :| I take them off half of my brand new motorcycles anyway, if you can't ride by moon light it's to freakin dark, go to bed and get up real early in the morning to go riding again tomorrow in daylight.

 

[TrialsRider]

Mikuni makes a carburetor rebuild "kit" ?
:I never seen one.

 

[Boostamante]

seems i have the 80cc engine. At least i know that for sure now. Wanted to make sure so i could order a carb rebuild kit as it idles a little rough and am afarid to crack her open and find out i need to replace gaskets. Would the xr100 /cb100 carbs / kits be the same?

nope. Let's start with this: What's the full engine number?

he01e-5104395

 

[Tanshanomi]

he01e-5104395

That's a 1980 XR80.

All the correct parts for this engine can be found here:
1980 XR80 A Honda Motorcycle Parts

 

[Boostamante]

he01e-5104395

That's a 1980 XR80.

All the correct parts for this engine can be found here:
1980 XR80 A Honda Motorcycle Parts

That's both good to know and a bummer at the same time. Lol, I'll get her running smooth, ride her and possibly hack job some lights for her so I can at least be visible in the hood. Thanks for your help guys!

 

[Tanshanomi]

Thought it would be relevant to include this chart here, considering all we've been discussing re: the little XL and XR models.