/r/Dirtbikes

Photograph via snooOG

Welcome to /r/Dirtbikes!

If you ride on two wheels off-road, then this is the sub for you!

Please read the rules before participating. Ride on!

Official Discord: discord.gg/mscomm

Welcome to the sub!

Posting: A lot of posts are acceptable. Pictures, advice needed, mechanical help, video, tracks, etc. Try to stay as bike related as possible, though.

RULES:

  1. NO ADVERTISING: Any user that attempts to advertise will be banned. This includes any product, service, YouTube channel, or other media. (Including subreddits). Users are still allowed to post personal videos, recommendations and advice on products/services .etc.

  2. NO FOR SALE POSTS: There are specific websites designed for buying/selling.

  3. INDIVIDUAL POSTS ASKING WHAT BIKE TO BUY WILL BE REMOVED: These types of posts go into the megathread stickied at the top of the page. If you can't decide on one make/model of bike, please post to the megathread.

  4. NO SLANDERING OF BIKES OR GEAR CHOICES.

  5. NO TROLLING

  6. NO POSTS ASKING TO IDENTIFY CHINESE BIKES There has been an influx in these types of posts and takes away from the general user experience. No exceptions.

  7. THE MODERATORS RESERVE THE RIGHT TO REMOVE POSTS/COMMENTS Any post/comment that causes controversy, political siding, drama, .etc. will be removed.

Remember, have fun, ride safe, and always wear your gear and a helmet!

Enjoy!

OFFICIAL DIRTBIKES DISCORD


RELATED SUBREDDITS AND USEFUL LINKS:

/r/Dirtbikes

114,635 Subscribers

1

Yamaha WR450F

I found a good deal on a wr450f. I’m looking for a good trail/enduro bike and prefer the reliability of Japanese brands.

Was originally looking at the KTM 350 exc-f and was curious how it compares?

0 Comments
2024/12/01
15:13 UTC

5

Dunmore, PA

1 Comment
2024/12/01
15:07 UTC

0

2 Stroke/4 Stroke Trail Bike

Hello everyone! I’m looking to purchase a trail bike to putt around with my boys. I’ve owned a series of different bikes in my life, but haven’t ridden in a couple of years. I owned a crf250x years ago, but sold it cause never had time to ride. Now, since my boys are older and they have bikes, looking to get back into it 😎

I am considering getting a KDX200/220, crf250x, or KTM??? My budget is around 5K.

Any recommendations would be greatly appreciated! TIA!

4 Comments
2024/12/01
14:50 UTC

0

am i too tall for an 85

im 5 9 and want to buy an 85

11 Comments
2024/12/01
14:25 UTC

1

2001! /Yamaha 426f\ IVE BEEN HAVING THIS PROBLEM. MY BIKE ONLY TURNS ON WITH A BUMP START! It has compression it has spark! I’ve clean and checked the carb! IN NEED OF HELP! WOULD BE VERY MUCH APPRECIATED!

3 Comments
2024/12/01
13:23 UTC

1

Kx250f 17’ or a ktm sxf250 15’

The kxf has 147h but has brand new tires on and a brand new cylinder and piston. It is being sold by a company. Also has new tires and no huge visible damages some scratches but not a whole lot. The suspension has been adjusted. They can also keep the bike over the winter and I pick it up when I want to start riding for no extra cost.

The ktm has 88h and is being sold privately. It had new piston and timing chain (kamkedja) at 78h has the recipt. It has a small hole on the seat cover. Some scratches on the plastics a bit more then the kxf. The tires have 4h old mousse. And the suspension was done 5h ago.

The upside with the ktm is that it is electric start. Wasn’t planning on doing a lot of enduro but some. But it is about 3h away. The kxf is a newer model but with a kickstart and it is only 1.5h away and sold by a company. Both bikes are listed to being often maintained. The ktm with oil change every 5-7h and the oil filter. The air filter after every ride.

I am planning on riding mostly track but some enduro. And I am a beginner so not going to riding it so hard.

They are both priced the same at about 3300dollar with zero negotiation. With the ktm I also get a few air filters with ktm.

So my wondering is what would you choose and how long would the bike last before needing a top rebuild or a bottom rebuild. I am planning on changing the airfilter after every ride and oil and oil filter every 5-7h.

2 Comments
2024/12/01
13:21 UTC

0

Engine conversion: YZ250X to stock YZ250

I own a 2016 YZ 250X and I'm looking to convert it to more motocross suited, in other words to a stock YZ 250. The why I'm doing is that in Finland you can get a lot better and cheaper insurance for the 250X. This is the only reason why I'm not buying a stock YZ 250: strictly regulatory and legal reasons.

So, I've already got a 21"/19" wheel set and the suspension will be tuned to regular YZ 250 spec the next time I send it to service. I have the impression that the suspension is otherwise the same on both models expect the valving is different.

That leaves the engine. If I'm understood correctly, the difference is pretty much a wider gearbox, less compression head, different YPVS assy and CDI. I have to service the top end and crank bearings soon, so I'm opening the cases anyways. I'm riding well below C-class, so not that fast yet. But learning more every time I ride. I don't ride trails, only motocross tracks. Now comes the questions:

  • I think the tracks in Finland are tight and somewhat technical compared to clips I see from worldwide. Does it make sense to convert the transmission to shorter YZ 250 spec or would I be okay just using different sprocket ratios?
  • Would it make sense to do the top end conversion to higher compression? Does this only increase top RPM power and make the bike more twitchy, or will the power increase on the whole range?
  • Will the YPVS conversion make the bike faster coming out of corners, or would I lose low end power and have to carry more speed to corners to keep the revs high?
  • What is the difference between the "X" CDI and regular CDI? I got the impression that it's just a different timing.
  • Would it make sense in my case just do the transmission conversion or just the top end & CDI?

What I am looking with these mods is to make my riding and learning easier. Sometimes at the track I feel that the current YZ250X setup takes a bit too long to get to the correct powerband and sometimes it feels that the 3rd gear is too tall and the 2nd gear too low.

I'm thinking of sourcing used parts for the gearbox, head and YPVS assy to keep the cost down.

6 Comments
2024/12/01
11:43 UTC

1

125 or 250

I want to get my first bike but im not sure which to get I mostly will be going to dunes and desert trails which bike is better

3 Comments
2024/12/01
08:40 UTC

0

Is the lowest part of the link is part of the shock? What is the point of this design, making it lower than the skid plate, can get beaten up so easily…

28 Comments
2024/12/01
08:35 UTC

1

Is it okay to transport a Klx110 on its side?

2 Comments
2024/12/01
08:35 UTC

42

Should my exhaust get this hot at idle?

I have a 23 klx 300 and i left the bike in neutral for about 5-7 minutes and I saw that the exhaust was glowing. I wasn’t revving it , i just let it sit. It idles at about 1900-2000 rpm. None of the dash lights were on, and its 32 degrees outside side. I’m mainly just wondering if this is something that is normal, or if I should take it to get looked at

42 Comments
2024/12/01
04:54 UTC

0

A couple dumb questions I’ve been wondering

Why can’t you swap a 2t head onto 4t bottom end

Why can’t you run 2t oil in a 4t

Why are surrons not street legal

8 Comments
2024/12/01
04:51 UTC

2

Best way to clean spray paint off a dirt bike and also best way to paint plastics

I’m broke but is spray paint worth it it feels like it just keeps getting ruined

4 Comments
2024/12/01
04:06 UTC

0

Can I cut my own air filter out of foam from Home Depot

It’s very hard to find a filter for my bike and I want to know if I could cut my own

21 Comments
2024/12/01
04:05 UTC

1

Best way to clean a dirt bike with years of dirt on it

Pretty much just the title my dirt bike was put away dirty in the nineties and I want to clean it

8 Comments
2024/12/01
04:04 UTC

1

Could a vacuum leak be the answer to all my problems?

1978 Suzuki pe 250. The carb boot is messed up and cracked open, the airbox line 100% has a leak in the pipe but is this why there’s no reliable starts (30-50 kicks and no life) but with starting fluid boots right up and revs are weird?

6 Comments
2024/12/01
03:56 UTC

1

can i fit the block of a yamaha dt175 to a 125?

1 Comment
2024/12/01
03:35 UTC

0

im looking for a dirt bike thats not that expensive. any suggestions?

im looking for a dirt bike thats not that expensive. any suggestions?

13 Comments
2024/12/01
02:46 UTC

0

1978 Suzuki pe250 will not stop revving upon start up

I have a 1978 zuk and I recently re did how the air flows through the carb (Previously made a duct out of flex tape) I got a clamp and some rubber plumbing tube and put it on like that but when I kicked the bike over it didn’t wanna stop revving could I need a rebuild?

6 Comments
2024/12/01
02:44 UTC

1

Does anyone know where to find a replacement?

Looking to replace this piece without buying a whole new cap

4 Comments
2024/12/01
01:49 UTC

12

Let the carb run out of fuel and my header got cherry red is this normal

30 Comments
2024/12/01
01:42 UTC

5

Normal amount of play for 1st gear?

1 Comment
2024/12/01
01:34 UTC

8

Cursed with another kawasaki, any tips about this here bike

7 Comments
2024/12/01
01:03 UTC

0

What does the “500cc” mean here?

Is it referring to the amount of oil that should be added? The bike is small and it caught me off guard since the bike should be 80cc and I doubt a 500cc engine would fit, could anyone help me out here?

9 Comments
2024/12/01
00:53 UTC

1

Can I still run this jug? (If not how can I bore it)

5 Comments
2024/12/01
00:28 UTC

1

Just got a kx 250x and had a few questions

The thing stalls really easily in first gear, would going down in rear sprocket size help with stalling? Also it’s a bit fast/snappy for me, what could I do to smooth out the power?

4 Comments
2024/12/01
00:24 UTC

0

Mx bikes lenght

Which one of the mx bikes is the longest?

0 Comments
2024/12/01
00:10 UTC

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