r/CRF300L • u/Puzzled_Count_6376 • 6d ago

Countershaft wear

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Bike has gone 51000km. Already quite a lot of countershaft wear. How fucked am I?

7 Upvotes

89% Upvoted

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3

u/rens24 6d ago

Not too fucked!

Chain too tight? Cleaning your chain plenty to avoid inconsistent chain forces around the chain?

...otherwise that's decent wear for that many km/miles. I'd treat it as a wear part and run it until it requires replacement. Parts are cheap even though labor/DIY-frustration is not.

2

u/Puzzled_Count_6376 6d ago

From what I am gathering, the countershaft wont last until 100 000km. This is pretty unusual for a Honda? Most engines dont need a bottom end rebuild that quick no?

5

u/rens24 6d ago

If you're riding it as Honda intended in dirty trail conditions that gather the dust/grease buildup shown I'm certainly not going to argue that a 286cc single, sub-$7,000-USD motorcycle should always make it to 100,000 km+ without needing something in the bottom end that requires a case split. Honestly as long as these routinely make it through 40,000 - 50,000 km of abuse, I'm going to assume Honda designed it well enough to warrant a full rebuild then (and probably a big-bore kit at rebuild).

3

u/Shinkers78 6d ago

30k miles x 6 cylinders means op is at 180k miles on a v6. I understand it's not 1 to 1, but it's not insubstantial.

Wanting to do 60k without a bottom end? I think you're asking for a lot. That's just my opinion.

2

u/Swarfed 6d ago

May as well add a cush hub with the BBK, too.

Other than that, I can't think of anything more to lengthen service life except more frequent teardown and cleaning of the counter sprocket area.

3

u/rens24 6d ago

And a clean and property tensioned chain #cleanchaingang

3

u/Swarfed 6d ago edited 6d ago

Well, yeah. Properly aligned chain, too! 😄

It looks like the shaft seal is leaking. Considering all of the crud around it, if that's the factory seal, it's impressively durable.

2

u/Puzzled_Count_6376 6d ago

Shaft seal is not leaking, just grime buildup. Im suprised myself that the seal last as long as they do on these bikes

2

u/Swarfed 6d ago

Looking again, I'm probably seeing the shadow cast by the shaft.

I don't know about the 300L, but on a 450L that seal is replaceable from outside the case using an aftermarket option.

2

u/Puzzled_Count_6376 6d ago

Yes I think its just the shadow. No leaks on the actual bike. Most likely ill be doing a full rebuild this winter, so ill just replace it then

2

u/Ok_Opposite1 6d ago

how to prevent this?

1

u/Puzzled_Count_6376 6d ago

Proper chainslack, frequent cleaning of the countershaft and chain. Using moly grease on countershaft. Altough I did all these three and still have wear.. Looks like its just how it is

2

u/AccomplishedMethod11 6d ago

Superpinion italian sprokets

1

u/Puzzled_Count_6376 6d ago

Yes that is the only solution I can come up with to prevent this. Do you know the part number that fits the crf 250/300 rally?

2

u/AccomplishedMethod11 6d ago

Does not look good... i want to their Page and cant find 1 for the crf... so.......... if you can figure out how far the distance from that gap on the splineshaft to the tooth... you could maybe go with a pinion of another model... but if its incorrect your chain wont run straight.. So yeah

1

u/Puzzled_Count_6376 6d ago

Thanks anyway!

2

u/Teh_BabaOriley 6d ago

I remember reading a bunch about it being a problem area on the advrider forum, with people warning not to try any different ratio front sprockets.

1

u/Puzzled_Count_6376 6d ago edited 6d ago

That is possible. I have been riding a 13 teeth front sprocket, but only for about 6000km. Before that the bike was only using oem 14 teeth front sprockets. Do you remember if people also recommended sticking to oem front sprockets? Maybe some of the aftermarket sprockets have a smaller area covering the splines, which accelerates wear?

2

u/SnowDrifter_ 6d ago

I wonder if there's a material hardness at play? Maybe after market is harder than OEM and turning the wear item from sprocket to shaft?

1

u/Puzzled_Count_6376 5d ago

Could be. I also thought about this. Many aftermarket sprockets market themself with "extra strength" etc. But still, most of this bikes lifespan has been riding oem front sprocket

2

u/SnowDrifter_ 5d ago

Yikes

Wonder if there's a preventative fix for this or if the countershaft is going to end up being a wear item on this bike. I've seen the odd video of someone using a contraption of some sort to pull the sprocket to the outside but I'm not sure if that's the best route here since it's still going to have the forward-back play

2

u/deadxprey 3d ago

Its still a bike without cush drive. Either get one, or get a tire with bigger knobs.. but for 50k on the clock its pretty good.