r/Dirtbike_Help

▲ 2 r/Dirtbike_Help+1 crossposts

Anyone running radiator fans on a CRF250R for hard enduro/trails?

Hey guys,

I’ve got a 2007 Honda CRF250R (kickstart only, no electric start) and lately I’ve been doing more hard enduro style riding — nothing professional, just slow technical rocky trails, tight sections, climbs, etc.

The bike gets hot really fast in this kind of riding, which I know is kinda expected because the bike was made more for MX than slow enduro stuff.

I’m thinking about installing:

  • oversized/high-capacity radiators
  • a universal radiator fan kit
  • a completely separate electrical setup just for the fan (small battery + on/off switch)

The idea is to avoid touching the bike’s original electrical system as much as possible.

Has anyone here done something similar on a CRF250R or another MX bike?
Did a single fan make a noticeable difference?
Any issues with battery life, mounting, reliability, mud/water, etc.?

I know it’s kind of a workaround and the bike isn’t ideal for this type of riding, but for now I’d rather improve it than change bikes.

Any advice or photos of your setups would be appreciated.

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▲ 2 r/Dirtbike_Help+1 crossposts

Yamaha TTR230 bad ticking/knocking

Working on this bike for my neighbor. She said the ticking started abruptly for no reason. She continued to ride it for a season or two after it started. She said there was no loss of power or an other issues. Valves are In spec, no exhaust leaks, good oil level. It sounds like it’s coming from the front of the engine. Any ideas what it could be? Anything helps!!

u/Mman_x8 — 2 days ago

motorcycle helmet vs motocross helmet for regular street

Hi, I'm planning on buying a dirtbike for street use and I was wondering if I should use a regular full face motorcycle helmet in that case or a dirtbike/motocross helmet, your help would be much appreciated : )

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u/Even_Friendship_4481 — 2 days ago

Does anybody know what this wire is for ?

Wire is wrapped around my spark plug wire but not connected on either side

u/dogs8709 — 4 days ago

Worth fixing?

Yz125 2002
Blew hole is the clutch cover and the clutch is minced to fuck is this worth fixing like burning new parts and shipping or should I just find a second hand one. I don’t know how deep the damage goes but yeha

u/LumpyFlight9398 — 5 days ago
▲ 3 r/Dirtbike_Help+1 crossposts

No Key

I lost the key to my 2018 XT250. What are things that I can do so that I can either bypass it completely or turn it into something I can just turn with anything. I’d have to come up with a solution for the gas tank as well.

I live in an extremely rural part of Nebraska and am not worried about it being stolen at all. Also being extremely rural, it would be expensive or hard to get a new key made.

u/Civil-Turnip2798 — 5 days ago
▲ 2 r/Dirtbike_Help+1 crossposts

Replaced Clutch Cable and Now Doesn’t go Into Gear

When testing the actuator arm, I pushed it all the way back just to see if the bike would move, and it the bike does not move when I do that. I took a video of the part I’m talking about.

When the cable was still on, I adjusted it and the lever felt normal, but the bike still wouldn’t move or go into gear.

Also, I did remove the piece behind it that holds the cable, so it’s not missing lol.

I’m probably not explaining this the best, but hopefully the video helps 🤷🏼‍♀️

u/QuantityDue3151 — 6 days ago

Clicking sound when using electric start.

Bike runs decently normally with kickstart, but using electric start it makes this loud clicking sound. I know for a fact the battery is worn out, but is this just a battery problem or are there multiple things?

u/Kindly_Theme_3226 — 6 days ago

learning about dirtbikes before getting one

im trying to learn more about dirtbikes and maintenance before i get one. if anyone has beginner tips, maintenance advice, or things you wish you knew starting out, let me know😭

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u/revvinggrace — 6 days ago
▲ 2 r/Dirtbike_Help+1 crossposts

Crf300rally crank no start.

Hey everyone, I have a 2021 300 rally crank no start. I was cruising in 6 gear around 7000 RPM and the bike just died a slow sputter but now I get no crank or start. I have check all fuzes, relays, and diodes. New spark plug, new stater, and ECM. It will back fire into the air box after trying to start for 5-10 seconds.  Any advice? 

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u/Apprehensive_Tie5702 — 7 days ago
▲ 5 r/Dirtbike_Help+2 crossposts

Help 09 KTM EXC 450 Knock

Can someone help me identify the problem here. Still learning dirt bike mechanics what part is knocking there? Is it a big deal? Easy fix or needs rebuild?

u/fblouin_ — 6 days ago

Fantic K-Roo: What?

Good evening guys. I’ve been wrenching on stuff for a while (98 Isuzu trooper and 87 Yamaha radian) and had an old 75 2 stroke when I was way younger. I was wanting a new project to mess around with, and came across this gem right here. I don’t know shit about “Fanitcs” but if anyone can enlighten me on whether or not I should buy this lmk. I’m in NorCal so $800 for anything that runs and isn’t a baby bike is miraculous

u/EsketitSR71 — 7 days ago

what tools do i need for dirtbike maintenance?

im kind of new to dirtbikes and trying to learn basic maintenance before i get one.what tools should i have for basic stuff like oil changes, air filter cleaning, and general upkeep?

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u/revvinggrace — 6 days ago

2012 KTM 200xcw idle issue

My bike has been idling high and pops? My friend thought it was the carb so I was going to take that apart and clean it but what do you guys think it is?

u/rizape204 — 8 days ago
▲ 8 r/Dirtbike_Help+4 crossposts

1992 KTM 300exc Parts

I have a 92 300 exc that’s been sitting for the last several years. Ran well for the most part prior to being parked in the shed a few years back. Still has lots of original parts and going through to repair and replace things and get it back on the trails. Parts are hard to find on a bike this old. Are there other year models that parts can be fitted from that are more easily available? Likely going to need stator replaced but searching some of the sites I normally get parts from I haven’t been able to find one so far

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u/along4215 — 8 days ago

Carb leak trying to adjust fuel/air screw

Im no expert but online said to snug and unscrew 1.5-2 turns but its leaking after about a quarter of a turn

u/Cole-deloach — 11 days ago
▲ 6 r/Dirtbike_Help+4 crossposts

1992 KTM 300 EXC Carb rebuild

I have a 92 300exc that has been sitting for a few years and I have decided to make a project of getting it running again. Currently trying to find a rebuild kit for the carb and I may just be searching in the wrong places. It’s a Keihin PJ38 carb but all of the rebuild kits I have came across so far have been for a PWK carb. Can anyone help me locate the proper kit?
Thanks

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u/along4215 — 9 days ago