TE/TC TE300 top-end hours before rebuild

My 2016 TE300 has about 120 hours, I would describe my use as not real hard (like harescramble racing), but not easy. All trail riding. I run 50:1 Yamalube R, clean air filters all the time. The factory manual calls for piston replacement at 80 hours. My experience with other bikes like KDX220R is even after moto-ing the daylights out of that for several years, when disassembled, it was still well within spec. How many hours have you run your TE300 before disassembly and what did you find?

I have done my ex 2014 TE300 at the high 100 hours mark as well as my 2017 TX300 around the same 170-190 hour mark. Both were beyond the hours by a lot, both had the bottom ring stuck in the ring groove on the exhaust side, both had quite a bit of blow by and carbon on the sides of the pistons. My bikes are always well tuned with no wet oil oil at the exhaust end and with dry but dark brown colored spark plugs , pump premium (Shell mostly) 50:1 on the 2014 and OEM 60:1 on the 17, always with Maxima K2
So high 100 hours from new is not such a great idea, I think you are in a good place to do a top end.

Thanks for your feedback.

I would recommend a new piston and rings every 80 hours.
If the bottom end starts to sound a bit noisy (knocking) then do a full rebuild.

This was the state of my 3rd piston after 100 hours:






And the failing big end crankpin after 200 total engine hours (engine started to sound like a bag of marbles when running):

My 2016 TE 300 has 264 hours and the miles show 3,955 but miles are more as sometimes I use my spare wheel which does not have a speed sensor
Motor is all stock as delivered and I see no reason yet to open it up

I have always run 110 leaded race gas mixed 50 to 1 with lucas
I run a NGK BR8EG plug

My riding buddy has a 2017 TE 300 with much more hours and miles and it is still all original

Bike has 4 years of National Hare and Hounds and 4 KOM and 4 LDS plus weekend rides

Husky makes a great bike

I put 120 on my 2015 before I slapped a new piston in to freshen it up. Still had a bit of life left and showed no heavy scuffing or wear marks. Thing ran like a champ when I sold it 160 hrs. One of the most reliable machines I’ve owned. I also know one of the techs at my local dealer put around 450 hard hours on his before splitting the cases for a full rebuild but did say there was some unnecessary wear that could’ve been prevented haha. I’ll probably push my tx to three hundred or so if it’ll go that long without any problems (bottom end that is). As for a piston I’ll open it up around 100 or so.

John runs the things in perfect tuned conditions with race fuel. most of us use premium pump (ethanol crap) and the results can be seen. There are so many mechanical variables anyway from skill level to type of riding as well.

Thanks Robert you have rode my bikes but these days I crawl over rocks and do single track like never rev it out so it just cruizes along
Soon I will open her up
Wait till you see my new build I am back on a 150

if you using good oil and clean your filter 120 to 150 is ok unless your a rever then 120 is better.

you can see if filter maintenance is sub standard as you get allot of marks on the piston, the side facing the reeds, that's all dirt getting in

Put 300 hours on my 14 300 and sold it with original piston. Just passed 100 hours on the 19 250 and won't be replacing it any time soon.