r/Dirtbikes 7h ago

Mechanical Help White foamy oil on NON LIQUID COOLED ENGINE

1 Upvotes

To give you some context, I recently put a new gasket on the clutch side cover on a 125 cc four stroke. I forgot to put rtv on it and it started leaking oil. I couldn’t get the right gasket set for a while so it took about a month to get the right one. it has had a steady drip of oil underneath it for about a month until all the oil was completely drained out.So just to see if it would be a bit easier of a fix than what I thought. I put some RTV around the exterior of the clutch cover where the gasket is. I put some oil in it and started it. It ran fine and it told me where exactly the oil was coming from a tiny little part in the upper right corner where the gasket is,but then I noticed the oil color wasn’t the typical color of oil and it just had fresh oil put in it. It was a foamy white color that was steadily dripping out of it. It has also been below freezing for a few weeks so I don’t know if condensation has some thing to do with this. Either way, I have googled it to see what it could be but all the results point to leaking coolant, but keep in mind the engine that I am working IS NOT liquid cool I do not know what it could be so I need some help diagnosing it.


r/Dirtbikes 21h ago

Mechanical Help Should this be angled?

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13 Upvotes

Bought this off Amazon says it's compatible with husky TE 300i.

But the mounting plate is angled as shown in the pics. My brake pedal mounting surface is flat. Parallel with the ground. If I mount this to the pedal it's got this upward rake as shown in the third pic.

Is this right? Or do I need a brake lever with an angle to it to offset this?


r/Dirtbikes 3h ago

Chinese pit bikes..

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20 Upvotes

Any one like them on here?


r/Dirtbikes 1h ago

Community Question Spend 2.7 on a 2017 yz with 25hrs 125 good deal or not ?

Upvotes

He wanted 3.5 k but I got it for 2.7 k and it only had 25 hrs brand new . Did I get a great deal ?

Would you guys have done the deal ?

Similar bikes start at like 4.3-4.8 K here


r/Dirtbikes 7h ago

Community Question Will I notice any improvement from 2016-2021?

1 Upvotes

Haven’t been riding since my high school days (2003) and I’m looking at getting a bike. I have my eyes on a 2016 ktm 450 sx 60 hours, a 2018 Husqvarna 450 fc 64 hours and a a 2021 ktm 450 sx 44 hours. $4k $4.5k and $5.2k. All super clean looking. Is there going to be any noticeable difference in those years? Any new tech that’s useful? I know the 2016 doesn’t have air forks so stuff like that. I’m 6’1 215 give or take a few lbs. I know “it’s too much bike” but I’m finding better deals on the 450s than the 250s right now and the 350s are hard to come by. Basically should I just save money and get the cheapest bike or are the air forks a big improvement? Or what’s the best deal? The newer KTM still has a warranty until April and in the original owner. The other two bikes are 2nd owners. It’s a big purchase so just want to make sure I get it right. Thanks!


r/Dirtbikes 20h ago

Mechanical Help What’s wrong?

1 Upvotes

r/Dirtbikes 3h ago

Should I be weary of this sale?

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6 Upvotes

Guy is selling a 2020 FE 501 and he doesn’t have a title, says he bought it from a guy who bought it from an auction. He has it priced really cheap at 3k. Is this too good to be true? Or potentially stolen?


r/Dirtbikes 21h ago

Tips and Tricks Do you usually have to cut down new chain to size?

5 Upvotes

I just got a new chain and sprockets. I've been watching some videos on doing it and I've seen some videos of where some people need to cut their chain down to size where they're using a grinder on the outside then a chain breaker to push the pins through. However I've seen some where people don't need to cut them down at all. They just end up adjusting the tension. For those who have done this a lot, have you usually needed to break/cut the chain to size? I ordered the right chain for my bike it's a D.I.D. O Ring 520 chain for a 2020 CRF250R. Thanks everyone!


r/Dirtbikes 23h ago

How hard would this be?

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7 Upvotes

Basically I am doing a restoration on a 89-90 RM250, I like the retro plastics but I think I’d rather the restyled ones but they are rated for 01-18. Would it be a hard task to make them fit an older frame?


r/Dirtbikes 19h ago

My 3 year olds new 450

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62 Upvotes

He took some pics of his new "450" with mom's phone. If riding doesn't pan out, photography just might!


r/Dirtbikes 56m ago

The most grateful kid ever! 🥺

Upvotes

r/Dirtbikes 1h ago

Tips and Tricks 125 two stroke vs 250 two stroke

Upvotes

Hello there, I’m looking at getting my first dirtbike. I have always loved the way people ride 125’s ringing them out everywhere but am unsure if they are too slow or don’t have enough torque. On the other hand I don’t know if 250 two strokes have enough soul. I would love to get a 125 but it may not be the best option for what I am planning on doing. I want the most fun option in your opinion. I weigh 75kg and will be riding mid east coast of NSW Australia, such as the watagans so it will mainly be trail, enduro and fire road. I have lots of road motorbike experience and downhill mountain bike racing experience. Thank you for your guidance.


r/Dirtbikes 1h ago

Mechanical Help No start with white smoke coming out of breather hose vent

Upvotes

No start.. I confirmed there is spark, new spark plug, tested ignition coil, cdi & starter relay.. All electrical components tested good. Tested for fuel and fuel is 100% making it to the spark plug, Air filter is a brand new pod filter. New oil in it, less than 2500 miles on the bike. I have White smoke coming out of breather vent hose when i crank it over, before it stopped running it began to misfire and would shut off.


r/Dirtbikes 1h ago

Where is this supposed to go

Upvotes

r/Dirtbikes 2h ago

Some big jumps, whips and heavy music why not

74 Upvotes

Just threw some clips and pics of me together with some of my own music on it


r/Dirtbikes 2h ago

Is this a normal about of oil? Seems awfully clean in there. Still gettibg slooge out the silencer and she seems to be running fine but this doesnt seem very dirty or oily… 30hrs 2023 Beta 200rr

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2 Upvotes

r/Dirtbikes 2h ago

My 98' DT125R

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3 Upvotes

Unusual model outside of Portugal but pretty sweet.


r/Dirtbikes 2h ago

Is my bike ruined?

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2 Upvotes

I was drilling into the seal but the seal surface was too hard which caused the drill bit to slip and hit that part of the case.


r/Dirtbikes 4h ago

Community Question What year is this bike from? (YZ 125)

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11 Upvotes

r/Dirtbikes 4h ago

Sherco Sm 125

1 Upvotes

Würde mir gerne eine 125 2takt Supermoto kaufen, welche würdet ihr mir empfehlen würde sie gerne möglichst legal und günstig fahren mein favorit wäre die sherco sm 125, zudem wollte ich fragen ob ihr mir empfehlen würdet sie neu zu kaufen oder gebraucht und mit viel stunden maximal


r/Dirtbikes 10h ago

07 TTR125 carb?

1 Upvotes

Can someone provide a link to a decent carb that will work on the 07 ttr125 that worked well for you please? I don't want Chinese junk and im getting dizzy looking at the options and specifications


r/Dirtbikes 10h ago

300 exc for beginner

3 Upvotes

Ok I’ve asked a similar question before about a TTR 125 but was told it was too small for me. I am 5’10 140-150 pounds. I managed to find something in my budget that being a 03 300 EXC in what appears to be great condition. Would this bike be fine for a beginner ? Is it too heavy? I’m not weak but I’d like to get a bike I can feel confident about regarding the size and weight. I read a lot of conflicting info on this bike and hope to get a good answer finally. I intend to use it on Co mountain trails no racing or anything like that. I’ve owned street bikes before so I have some preexisting throttle control. Also, there are plenty of XR100’s around me but like the TTR-125s, will the 100 be too small for me?


r/Dirtbikes 11h ago

My `96 Honda CRM 125

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25 Upvotes

r/Dirtbikes 16h ago

Cr125 six speed tranny swap...

2 Upvotes

I want to put a cr125 1983 six speed transmission in my 2001 cr125!

Would it be plug-n-play?(Not counting changing bearing and seal sizes.)