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Discussion Starter · #1 ·
For a air cooled dual sport bike, what is the common/typical life span, in miles, before engine or trans rebuild ?
 
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Discussion Starter · #3 ·
If you eliminate the best and the worst as 20% of the total. That should leave you with 80%. The general life span of those 80% are around what ? Assumes oil was changed and bike was not abused but used as it was designed.



Example it is common for Honda Goldwings with normal maintenance to see well beyond 100,000 miles. Some see well over 300,00 but that is a exception as some that barely make it to 50,000 miles.



The guestion does have a answer for bikes serviced normally and ridden as designed.





Too many factors..some people change the oil, other people dont. Some people baby them and others ride them hard. I have seen many pristine 87 models and ive also seen 2006's that have been trashed. Somehow i dont think i answered your question
 

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mine came with records stating regular maintenance was done by the owner. it was ridden off-road only until 2007. only difference in maintenance was he changed the oil every 400-600 miles and used motul synthetic since 07. it now has 15,757 miles on it and has a base gasket "weep". I think QWERTY said in a post he had 47k on his but don't take my word for it I'm sure he will chime in soon enough.
 

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Skip to the end for short answer lol.



This is a very difficult question to answer, because, as xdac said, there are so many variables that can affect the life of the engine. But you seem like a smart guy, so you already knew that
The reason it is so hard is because an average mileage considering the vast differences based on all these factors doesn't necessarily mean anything. Factors that can contribute to longevity of the motor and trans: oil level (forget to put oil in, put too much or too little oil in, not watch the oil level and let it get really super low as the bike burns oil, etc. etc.), service intervals and quality of maintenance/repair services, luck (ex: unlucky=not noticing that the oil filter you just bought is not the right one, because the box it came in says TW200...), use (ride like an ass hole or an old lady), break in procedures, regular engine warm up practices (or lack thereof when riding), possible quality control issues from the factory, etc. Anyway, assuming the WORST of all these things, you could need a rebuild 300 miles from brand new. Assuming the BEST of all these factors, the bike will probably go about 30,000 miles without needing a top end rebuild (the highest mileages without rebuild I remember reading have been about 25-30k), 50,000+ miles with a couple rebuilds. My TW has 15k miles on it now and has basically had two top end rebuilds. The first was because of the negligence of the work done by the utterly incompetent dealer service personnel whom I used to pay to "maintain" my bike, before I knew better. They put the wrong oil filter in the bike and the top end was f'ing toast a few minutes later. The second rebuild was done by myself a couple thousand miles after the first rebuild, because one of the valve adjuster nuts backed out, and my friend was on the bike and didn't know/think to shut it off right away. However, the bike has had tons of problems since 3k miles (some of them undoubtedly due to the failing service department before I started doing my own maintenance) and I suppose my particular unit probably would have needed a top end by now anyway.



SHORT: If you are a realist/pessimist, expect about 15k miles out of an average TW. If you're an optimist and you think you can do everything right (maintenance, break in, go easy on the bike, etc.) then expect about 30k before a top end job is needed. Of course depending on the particular circumstances, your experience could be more or less than these numbers.
 
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Qwerty has posted that he has 46k, with no rebuilds. I can easily see that if you know how to take care of it.



I don't know why heat and engine speed are so rarely mentioned when it comes to lifespans. If you run the thing near red line in lower gears at low speeds doing hill climbs or something in high temperatures you'd be damn lucky to get even 10k. If you run it like I do, always 80 degrees or below, cruising the road at no more than 55 mph or so it should easily see 50k with good maintenance.



The faster it runs, the faster it wears out. Don't run it at 8000+ all day long, mine feels best at 5000-6500, which is about 40-55 mph with 14/47 gearing.



The hotter it runs, the faster it wears out. High internal temps put more stress on the parts.



Keeping it at 35-55 mph for air-cooling is optimal.



Those are some good simple tips to remember if you want it to last as long as possible. Of course if you can afford to buy a new TW every year(used isn't too costly) screw what I said and have fun beating the hell out of it!
 

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I did mention use (ride hard or ride easy) as one of the factors of engine wear. It is my opinion that 50k without a top end rebuild is highly unlikely even with very easy use and perfect maintenance, although not necessarily impossible. Apparently Qwerty is almost there...? And I know there's a guy who has at least 70k by now, but has also done at least two rebuilds.
 

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Qwerty has posted that he has 46k, with no rebuilds. I can easily see that if you know how to take care of it.



I don't know why heat and engine speed are so rarely mentioned when it comes to lifespans. If you run the thing near red line in lower gears at low speeds doing hill climbs or something in high temperatures you'd be damn lucky to get even 10k. If you run it like I do, always 80 degrees or below, cruising the road at no more than 55 mph or so it should easily see 50k with good maintenance.



The faster it runs, the faster it wears out. Don't run it at 8000+ all day long, mine feels best at 5000-6500, which is about 40-55 mph with 14/47 gearing.



The hotter it runs, the faster it wears out. High internal temps put more stress on the parts.



Keeping it at 35-55 mph for air-cooling is optimal.



Those are some good simple tips to remember if you want it to last as long as possible. Of course if you can afford to buy a new TW every year(used isn't too costly) screw what I said and have fun beating the hell out of it!
Qwerty has posted that he has 46k, with no rebuilds. I can easily see that if you know how to take care of it.



I don't know why heat and engine speed are so rarely mentioned when it comes to lifespans. If you run the thing near red line in lower gears at low speeds doing hill climbs or something in high temperatures you'd be damn lucky to get even 10k. If you run it like I do, always 80 degrees or below, cruising the road at no more than 55 mph or so it should easily see 50k with good maintenance.



The faster it runs, the faster it wears out. Don't run it at 8000+ all day long, mine feels best at 5000-6500, which is about 40-55 mph with 14/47 gearing.



The hotter it runs, the faster it wears out. High internal temps put more stress on the parts.



Keeping it at 35-55 mph for air-cooling is optimal.



Those are some good simple tips to remember if you want it to last as long as possible. Of course if you can afford to buy a new TW every year(used isn't too costly) screw what I said and have fun beating the hell out of it!
My 2020 TW could easily be like a "barn find" hand-me-down to my grandson (he's 2 now!) Put an older older model beside a newer one and I can easily see that Yamaha's vision has more than likely been, that if they have a good thing going, why muck it up? I am 68yrs old and I have a whole lot of fun on mine. I guess, being old school, I just had to buy the carburated version and I carry a rebuild kit in my tool bag. No problems so far!

Also, who needs a track? In nearly every community in this country they are building subdivisions everywhere. I go up in there where the heavy equipment has been running and the terrain changes every day. I am careful to avoid areas close to completion, like where they are running water or fiber optics, or electrical in. I just use common sense and whenever I see anyone at all on the projects after hours, I ALWAYS ask permission. And where I live, here in North Texas, no one has turned me away yet! Go for it
 

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This thread was started in 2011. My answer to the question though is 42,000 miles. That's around when I had to do a valve job, timing guides and a carb overhaul.
Curious how often you changed the oil, and if it was off-road dusty conditions.
 

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My bike has been used on the streets mostly without much dust. I have done oil changes regularly at 3000 miles. I ride my bike daily with few exceptions to and from work. I have wondered what off road hours would be equal to X-miles. How many hours to the first valve job?
 

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1500 for oil changes in extreme circumstances should see you through, given the amount of oil in there - it's a bit like a car, 12,000 or one year - depends on the oil, and the sump capacity

"Jap Crap" (and I make no excuse for that term) bikes tend to be bullet proof up to 32k, after that, it depends on the owner. Some of the bigger 4's go for considerably longer, but 350cc or less, and 32k is about your mark - after that, they are showing symptoms of needing a top end re-build - "clapped out" for want of a better term

Ken is an exceptional owner, and can show just what kind of mileage these machines are capable of, but how much of the history do you know of yours ? .....
 

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Off topic...but seeing my comment above from ELEVEN YEARS AGO is an interesting experience for me just now :) It's kind of sensational to me, especially given that everything on the internet today seems so fleeting (live video feeds and Facebook or Instagram posts that are basically gone and forgotten in a matter of days, etc.).
 

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2003 TW;2018 KLX250 camo ; former owner of 2006 TW (retired at 23k); 19' S3, 09' F-250, 97' Cherokee
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My first TW was purchased new, it was an '06.

I rode that beast so darn hard (welded frame in 4 spots, like six different time (x2 in one spot) and frequently went on 60+ minute rides on hwy at 8,500 rpms or above (to get to the dirt).

However, I did change the oil very frequently and documented all of them over the time of owning that machine for 11 years. I believe I averaged something like 200 miles on an oil change!

Bike was very solid (except for leaking front fork seals) when I sold it with just under 23,000 miles. This is an excellent example of the durability of these machines, when taken care of. My only issues with the '06 was leaking base gaskets. Oh, and the weak frame that broke in common areas.

My current TW is an '03 that I purchased a year ago for a property maintenance vehicle. I bought it with 420 miles, I now have 708 miles! I'm afraid it will take the rest of my life to accumulate the miles of my previous life...such is life. While I don't expect to ride it nearly as much, I also don't have the time to meticulously maintain it like the last one.
 

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I did mention use (ride hard or ride easy) as one of the factors of engine wear. It is my opinion that 50k without a top end rebuild is highly unlikely even with very easy use and perfect maintenance, although not necessarily impossible. Apparently Qwerty is almost there...? And I know there's a guy who has at least 70k by now, but has also done at least two rebuilds.
I'm about at 28k with no rebuild anywhere in sight. But the previous owner used it as a small commuter so, pretty cushy life before me I'd say.
 
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