DougalStrachan
Likes Dirt
Never been a motorbike person but recently got my son a 2015 KTM 125 SX - oh dear - now I have to learn about two strokes. Looks like we already need a new spark plug. This will be a steep learning curve I'm sure.
Motorcycle Thread - Post it all
- Thread starter Minlak
- Start date
Minlak
custom titis
It’s going to be a huge learning curve - you wheeled it out of the shed it needs a rebuild - started it yup that’s a rebuild - went for a ride yup another rebuild - buy the spares in bulk
Ultra Lord
Hurts. Requires Money. And is nerdy.
Pics or it didn’t happen.
The bike that is, I don’t need to see your dirty plug
Mattyp
Cows go boing
Learn the ins and outs of your air screw, if you find you're fouling plugs too often, put a smaller pilot jet in it...or just twist the throttle and hold it pinned....prinnnnnngg ding ding ding baaaaaaaaaaaaaaaaaaaaaaaaaa-aaaaaaaaaaa!
This vid should teach you most of what you need to know.
DougalStrachan
Likes Dirt
Yep - that's the plan
Thanks for that - I'll give it a watch
How remiss of me!
dazz
Downhill Dazz
You might be surprised how smooth the power delivery would be on that 125SX, still no 250F but they aren't the on/off switch they used to be.2 stroke Powerband might also make for an interesting learning curve
Minlak
custom titis
Been a while since I have been on a 2 stroke - they probably are better now
Nephew had an RMX125 works bike some 10 years ago. Ish. I expected the old on off power delivery like the YZ250 a mate had in the dark ages. Really surprised me. There was usuable power from maybe 4,000 rpm through to redline. Yes it came on stronger after 6,000rpm but not the sudden dump of old. You could easily keep it in the power band but less of an issue chasing gears if you dropped off. My 290 HRC trials bike was more like a low revving 4 stroke than a 2 stroke. Plenty of low torque for 2nd and 3rd gear then had the explosive power of a 2 stroke for jumping. That had a multi stage reed or something from memory. 1st gear was good for dumping newbies on their arses.
DougalStrachan
Likes Dirt
You can certainly tell when it hits powerband, and the young bloke has brown trousered himself trying to do mono's but doesn't seem to be the whack in the pants I keep hearing about.
Minlak
custom titis
In the old days it was more of an issue with people thinking something was wrong. Maybe felt slow off the line and you kind of look around and down etc seeing if everything is ok then bam it hits power band - was never really an issue if you were accelerating super hard and expecting power
Chriso_29er
Likes Bikes and Dirt
More an issue on a big bore, Give a 250 2 banger a go
Or if feeling really brave a CR500 haha
Or if feeling really brave a CR500 haha
I don't have enough pairs of brown trousers for a 500 gp bike.More an issue on a big bore, Give a 250 2 banger a go
Or if feeling really brave a CR500 haha
When you are sick of the R 1300 GS next month I will buy it off you for the usual depreciation discount.
dazz
Downhill Dazz
The Doctors are a good solid, comfortable bike.
Butt...
What you really need to do is properly educate yourself by watching 6 or 9 hours of Ronnie Mac content. Emulate his riding technique and general approach to life and you'll be set!
4-strokes-suck