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Hey Guys, I know the 125 has alot of different/upgraded parts from the 250 engine and wanted to hear some estimates and opinions on what you guys think this engine will do over the years/miles.

I know alot of people will immediately say " the way


Hey Guys, I know the 125 has alot of different/upgraded parts from the 250 engine and wanted to hear some estimates and opinions on what you guys think this engine will do over the years/miles.

I know alot of people will immediately say " the way the bike is maintained will determine how long the engine lasts etc..." So let's assume regular oil changes and valve adjustments with normal sporty riding...

Also, feel free to point out any engine components or design flaws you think might be a potential problem in the future. One thing I noticed in my reading of the honda site was they state in the Details & Features page for the 125's engine-
"New sleeveless “open-deck” die-cast aluminum cylinders are 800 grams lighter and feature a friction-reducing “T-treatment” plating"

This is what worries me... Sleeveless aluminum cylinders could spell trouble in the long run (i.e. 70's chevy vega's if anyone knows what I mean)...Now maybe i'm just looking too much into this but I used to own a klx250s and they also use sleeveless cylinders but they coat them with a special Nikasil coating which prevents these problems it actually mentions it on the KLX's page-
" Aluminum cylinder features electrofusion coating, which allows a tight clearance between piston and cylinder for greater horsepower and increased engine life thanks to superior heat transfer and lubrication retention properties"

What I'm wondering is if the "friction-reducing T-treatment coating" is the same Nikasil coating or something like it? Just because I for one am planning to try to get at least 100,000 miles out of my bike and would hate to end up with a seized engine. I wonder if this engine would ever need to have it's cylinders re-honed at a certain milage? I know that Nikasil lining is supossed to prevent engines from needing this so I'm hoping the 125 engine is the same.

Well anyway, my estimate is... I'd say with 1250 mile oil changes, no accidents, normal sporty, but no abusive riding, and definitely regular valve adjustments and no aftermarket engine work- 130,000-150,000 miles. I think modern motorcycle engines are just as reliable as car engines, it's just that so few people ride them long enough before selling or crashing them to see just how far they can go. I for one want to see the country on mine though! Can't wait to hear your thoughts!:)
 
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When I bought my 250R I researched this and it seemed an average engine was 40k-60k depending on maintenance. It seemed like once you got into the higher millage the engine would not wear out, but something internally would break.. Even at the 40-6

When I bought my 250R I researched this and it seemed an average engine was 40k-60k depending on maintenance. It seemed like once you got into the higher millage the engine would not wear out, but something internally would break.. Even at the 40-60k range it was said that the cylinders, rings, ect. still looked like new..

At this point it cheaper abd easier to buy a new engine rather than rebuild a high millage one, at least on an engine of this size.
 
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Good point. I did not think of that. I can imagine with the price of this bike being so low, it most likely cheaper to get a new engine or bike than to constantly replace small internal parts as they break in order to keep it running...Perhaps thats

Good point. I did not think of that. I can imagine with the price of this bike being so low, it most likely cheaper to get a new engine or bike than to constantly replace small internal parts as they break in order to keep it running...Perhaps thats why we don't see too many small-bore bikes with high-mileage.... I guess I should change my question to "How long do you think the engine will last until it is no longer economically-feasible to keep it running. i'm sure if you have the cash and have your mind set on keeping your 125 (or any bike for that matter) running forver you can by just replacing the parts as they break...

Also, I'm hoping the transmission turns out to be well made and durable as well as the slipper clutch. Wishful thinking...
 
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[QUOTE="cbzdel, post: 1477"]When I bought my 250R I researched this and it seemed an average engine was 40k-60k depending on maintenance. It seemed like once you got into the higher millage the engine would not wear out, but something internally would break.

When I bought my 250R I researched this and it seemed an average engine was 40k-60k depending on maintenance. It seemed like once you got into the higher millage the engine would not wear out, but something internally would break.. Even at the 40-60k range it was said that the cylinders, rings, ect. still looked like new..

At this point it cheaper abd easier to buy a new engine rather than rebuild a high millage one, at least on an engine of this size.
im a little confused, by this do you mean that in your 250r everything was still good at 40-60k miles, even though your research showed otherwise?
 
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Chamber and ring wear was next to none, you would expect that would would be what kills the engine, but not with this engine or at least the 250 engine.. it was other internal components wearing out, I found issues with the cam seemed to be the most

Chamber and ring wear was next to none, you would expect that would would be what kills the engine, but not with this engine or at least the 250 engine.. it was other internal components wearing out, I found issues with the cam seemed to be the most common thing I read about IIRC.. so I would think with regular valve maintenance there is no power loss as the engine ages..

The problem is our engines live most of their lifes in the high RPM and Kawi can only do so much to make the parts last as long as they do and keep the price as low as they do..

Hope that makes a little more since..
 
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yes thanks for clearing it up for me. sorry i have next to no experiance with engines and especially motorcycle engines

yes thanks for clearing it up for me. sorry i have next to no experiance with engines and especially motorcycle engines
 
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Discussion Starter #7
how much do new motors generally cost?

how much do new motors generally cost?
 
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I seen a used one 250R eninge Craigslist in my area that had less than 1000 miles on it and they were asking $750 or best offer..

I actually thought about picking it up to make a go-kart out of it haha :)


I seen a used one 250R eninge Craigslist in my area that had less than 1000 miles on it and they were asking $750 or best offer..

I actually thought about picking it up to make a go-kart out of it haha :)
 
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[QUOTE="cbzdel, post: 1599"]I seen a used one 250R eninge Craigslist in my area that had less than 1000 miles on it and they were asking $750 or best offer..

I actually thought about picking it up to make a go-kart out of it haha :)[/quote]

^ should hav


I seen a used one 250R eninge Craigslist in my area that had less than 1000 miles on it and they were asking $750 or best offer..

I actually thought about picking it up to make a go-kart out of it haha :)
^ should have haha
 
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Reverse gear is the issue though, I have seen work arounds but I have very minimal welding and machine work skills so I probably would of killed myself with it, hit a pothole at 30mph and the frame snaps in half haha!!

Reverse gear is the issue though, I have seen work arounds but I have very minimal welding and machine work skills so I probably would of killed myself with it, hit a pothole at 30mph and the frame snaps in half haha!!
 
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