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XR100 Differences in model years

FourDoor

FourDoor

New member
Joined
May 7, 2002
Location
Chino Hills, CA
Moto(s)
NSR50
Hey whats up guys. I was looking to get some info on the different model XR100/CRF100. What is the primary difference between the different model years? Is there hp differences? Actually what is the base hp on these bikes? Will the aftermarket big bore kits work on all XR100/CRF100 motors or are they all different?

I'm primarily interested in the motor differences. I read this article here:

http://www.socalxrs.com/Buildxr.htm

It stated:

Buy a new or used XR100. If you're going to buy a used one, try to get a 92' or newer, because it has electronic ignition; otherwise, you'll end up paying about $150-$200 for one off ebay.
Click to expand...

Can someone help clarify that statement for me?
 
I think your confused.. the CR.. a two stroke not a CRF.. the CRF is a 4 stroke.. the CR is a 2 stroke.. and yeah they're different..

Your taking a XR100 engine ans stuffing it into a CRF frame.. shich has the good suspenders.. Honestly not worth the effort but that's my take.. and YMMV.. cause I put a lot of effort into stupider things.. so.. it might serve you well..
 
Maybe I wasn't clear. I am interested in the 4stroke XR100 and the 4stroke CRF100. Definitely not the CRs. The link above was just to quote the fact about the XR100 being different from 92 and up based on it having "electric ignition".

From what I thought, all the old 1980something XR100s were pretty much the same as the 2000 CRF100s but wanted to know the differences in each year and which one would be the best buy. If I could buy an older XR100 for $500, but have to put in 200 or so more into to make it the same as a stock 1990something version, then I may as well buy a 1990 something for the same price to save me the $ and time.

But if the pre 1990 something XRs are exactly the same internally as all the other years and just little knick knacks like the CDI and what not are the same, then I may change my mind into which ones to actually get.
 
The odl style is a 6 v system and the newer ones are 12v The xr and crf are similatr... The plastics are different looking... The xr looks not as ...well not as racey....
 
Okay.. I thought I might have gone off on a tangent.. Honestly I don't remember the differences in that motor. I know the XR/XL/600/650 bikes well.

If it's the same displacement bore and stroke wise is the same then you can bet it'll interchange. ... You might find improvements that won't affect how they go together like decompression levers and cam gears.. possibly cyl/piston connecting rod differences.. but it's not like your going from a XR100 to anything else.. it's still a 100cc engine.. I have 86 XL6R parts on an 86 XR6R.. they were very different in stoke and bore/transmission gearing even though they displaced the same. So I can't swap bores and pistons but all other bits interchange like clutch baskets and oil pumps, kickers, case half's.. sump covers.. heads... etc..

I think they went from dual shocks to a single shock in the the CRF.. The swing arms probably different too..



FourDoor said:
Maybe I wasn't clear. I am interested in the 4stroke XR100 and the 4stroke CRF100. Definitely not the CRs. The link above was just to quote the fact about the XR100 being different from 92 and up based on it having "electric ignition".

From what I thought, all the old 1980something XR100s were pretty much the same as the 2000 CRF100s but wanted to know the differences in each year and which one would be the best buy. If I could buy an older XR100 for $500, but have to put in 200 or so more into to make it the same as a stock 1990something version, then I may as well buy a 1990 something for the same price to save me the $ and time.

But if the pre 1990 something XRs are exactly the same internally as all the other years and just little knick knacks like the CDI and what not are the same, then I may change my mind into which ones to actually get.
Click to expand...
 
Thanks guy. Keep em coming. I've been to xronly crfonly thumpertalk trying to read up as much as I could on the bike before I buy. Basically I'm trying to find one that I has the most mod potential for a larger big bore kit and other hop ups. If I find a good deal I'll bite but the price ranges vary quite a bit on the 2000 plus models.
 
How much are you looking to spend? I have an 05' crf100 collecting dust in my garage. BBR springs front and rear, FMF exhaust, jetted. No other motor mods. Low hours. My kid has no interest in riding.
 
I'm looking for a pretty beat up one so I doubt your CRF is going to be in my budget as I am looking to buy something below $1k. Thanks though.
 
I wouldn't buy anything older than '92 just because of the CDI - why mess with points? Model year 2000 was the last year for the old plastics (2001's and up have the fake radiator shrouds and MX style seats & rear fender). So a year 2000 generally fetches a good bit less than a comparable 2001 even though it is the exact same bike. If up-to-date looks are important then you will want a 2001 or newer. Motors are the same from 92 up.
 
It's funny you mention the plastics since I ran into this page online and all it differentiated were pretty much just the plastics:

http://www.cyclechaos.com/wiki/Honda_XR100

In terms of Big Bore kits for the XR100 is there a difference between the different year bikes and the different big bore kits out there? I'm assuming all the 92+ bikes big bore kits would be the same, but what if I bought a pre-92 motor?
 
xr100

The motor on an xr100 is basically the same from 1982 to current. Big bore kits and stage 1 camshafts all fit really old bikes to current. The ninetys -2000 model year all look like an xr100. In 2001 they went to the newer crf100 body style (plastics) which changed the muffler and that's about it even though it's still called an XR100. In 03 or 04 they started calling the XR line CRF to make over the image of their trail bike line. People were starting to think of the XR's as '80's bikes and not good trail bikes. With the dawn of the 4 stroke MX race bike (CRF250/450) the CRF is the new hot name. The bikes basically remain the same, good trail bikes that are great to learn on.

You should know however that even though they are said to be "bulletproof", the suspension is a joke and wears out within a year or two. The brakes are drumb which isn't exactly good stopping power and in general, they are seriously cheap bikes intended for kids to ride a few years and then outgrow. If you're an adult (150Lbs. or so) jumping one of these will easily bend forks, axles, blow out the shock and tweek the wheels really fast.

Resale on an XR100 is pretty low and lower than the CRF100 even though the bikes are the same (essentially). Don't pay more than $1000 for a CRF100 unless it's a 2007 and perfect with less than 250 miles on it. I paid $300 for a 2001 XR100 that was pretty beat up. $200 worth of ebay stuff made it a pretty nice bike for $500. In the condition mines in now, it's probably worth $700 to $800.

Don't plan on building a big motor with a big bore kit when you could just as easily get an xr250 or the crf230. It's not worth your time or money. If you're broke and looking for a trail bike, get an late ninetys XR100 for $500 or so. If you know that you'll quickly outgrow it, get the newest one you can find for the best price so you can sell it without taking too much of a loss.

PL
 
Whoah, $300 for a 2001? Now that was a deal.

Thanks for all of the gret info. That was really informative and has really helped. The plan for the XR100 was to actually use the motor as a donor bike for my NSR50.

Now I just need to find a tutorial on how to convert the pre92 XR motors over to CDI if they are all mechanically the same.
 
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