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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
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#1
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How many hours on bottom end?
Curious, how many hours do you run on a bottom end before you feel a rebuild is due?
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WildAzzRacing YouTube channel Trail Riders of Southern AZ club AZ State Parks OHV Ambassador '11 EC250R '98 KDX220 |
#2
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Well my 2007 ran the left hand main bearing in late 2018 so I rebuilt the crank as well. Don't have an hour meter so will have to estimate 'Lots'.
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'07 EC300 GG '14 TXT250 GG '? 496 CPI Cheetah RZ/RGV hybrid '22 765 Street Triple RS '21 XTrainer '69 Stinger T125 Suzuki '23 TRS 250RR (it's a Trials thing) |
#3
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I used to do mine at around 300 hours. I have a mate with a 2018 that has 400 on it with no need as yet. But he is very smooth and doesn?t do high speed runs either.
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Back on a gassy! 2018 EC300! 🤘 Txt 280 07 to make me feel like a gumby again |
#4
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Very smooth? Thanks nate!
Sold my 2010 with just on 700 hrs. Crank was fine. Don?t rev the Christ outta it,well oiled filter and never lean. Works for me.
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2011 TXT300R 2018 EC300GP |
#5
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Had over 900 hours on my 07 Gasser when I sold it and bottom end had never been touched. I went 200-300 hours between top end rebuilds.
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#6
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I did mine at 300hrs and the mechanic gave me the crank etc to keep as a spare since it was all still fine. I only did it because the bearings on that model were sealed, but by 300hrs the rubber seals had worn open so probably not something to worry about
And i drowned my bike a few times so had good reason to do it, but good airfilters and good oil seem to be the trick
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2003 txt250 Pro 2013 Ossa 280i |
#7
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Run good oiled air filter and quality premix oil and they last a long time.
I had 13yrs ~ 400hrs on my 2000 XC300 with the 327 big bore kit and the crank bearings started to feel and sound slightly noisy even though it was still tight. I swapped it out with a spare rebuilt bottom end I had. I would use the old one again (as it is) if I was in a pinch. I will swap the bearing when I get some free time. |
#8
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My 2005 300 has over 70 hours. Still tight
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05 ec300 01 wr426 98 polaris trail boss |
#9
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I'm estimating my hours, but for the first two seasons my riding buddy counted about 200 hrs each on his meter... things have slowed down a little after that. I'd guess I have 700+ hours on my 2014 crank problem free
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2021 Beta 300RR 2014 Gasgas XC300R 2019 850 Pro RMK |
#10
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About 21 years and god knows how many thousand miles on the road a few hare and hounds and a few mx tracks .
These bikes are well built . |
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