I've got a Suzuki LT250r cylinder that was welded up in a number of areas and has about that much exhaust port. I just have to finalize the squish and chamber volume before it's ready to run. That KX should do well.
I really hope so, it has done spectacular before, with kawasaki cylinder that i ported. But this is a new fresh start with back to 72mm stroke and redesigning the intake. the cylinder looks really good from the start, they say it´s a scaled up copy of Honda RS125R cylinder.
Most i have gotten out from a moped was a rieju drac, i put 80cc on it, homemade intake and exhaust, did some portning and ran it on methanol, it put out 28hp at the wheel.
Love the balance shaft and reverse cylinder mods being done on this kx 👌 I’m reversing x1 of the cylinders on a Vtwin 2 stroke…… is there any downsides you have come across or can think of to turning the cylinder 180 degrees? With crank rotation and carb inlet being standard? (Boost port flow etc???)
Nice, thanks =) Actual function would be the same, i´m thinking gasflow etc etc. But one thing to consider is that the thrust side of the cylinder is also 180 turned. That means if you are having a cylinder with intake, and like kawasaki,, big open area. This supports piston less, in my case when first tried this with my kawasaki cylinder, i broke the piston like after just 5 minutes of runtime. That´s why i decided to use a non intake cylinder and make(still in progress) a crankcase intake system. The easy way is an reedvalve, but i am at this point sketching a little on doing a rotating disc intake, no promises though. I just might take the easy way out. But i AM curious about rotating discs ;)
It isn´t this one, but very similar, might even be the same. koneita.com/sv/skaervaetska-och-gejderolja/2743-leikkuuvaha-karnasch.html?SubmitCurrency=1&id_currency=2&setcountryiso=SE&gad_source=1&gclid=CjwKCAjw0t63BhAUEiwA5xP54ZZNCgj3MmxywkD7tMytqLo2l9NIGGZYfl2-jRBQNydXwvMwnMD05RoC5KoQAvD_BwE
husqvarna sm125 20whp untouched cylinder, 28.2whp with spacer to lift cylinder and porting. so like 40% :) did some work on my friends suzuki pv oem cylinder, 1.5hp from the factory. stroked +10mm bored +7mm. 3port exhaust, a few more transfer ducts and it made 14.8whp so does it count as 980% :D
What's your opinion on the best exhaust port design? Single oval, bridged, or triple auxiliary? I'm building a rc1 scooter engine and I'm trying decide on what cylinder to go with.
I would say triple. This because it offers best ring life in my opinion. Well,, mild single port will ofcourse be better. But if we are talking high performance exhaust ports, i´ll take tripe every day in the week.
@@Patricks_Projects sounds like I'm going to be going with the ottopunto 8.1 cylinder, going to make an adapter plate to put the rc1 style 8.1 cylinder on my short case horizontal minarelli!
It seemed to be a l8ghtweightoption to me but obviously its heavier than the tzr 250 😳 The concept to be used as an alternative to the gokart engine sounds very neat. A clear GO from here to get that greens monster screaming🤩
Just some time and a piston, and it should be running, need to take it apart though, as there is pieces of piston still left in the crankcase/mainbearings.
Whaddaya think? Balanceshaft and slipper clutch kx250 engine, married to a tm racing 250cc barrel. Worth giving it a go again? It's been collecting dust for years now.
Yes i know, But as the aux port is triangular shaped there is very very little that actually shortcircuits into exhaust. But it can also be solved with torlon plugs in the wristpin.
On the sidestrap when having the 'correct' heatnumber on your plug you get either soot or nickel plating(on a new plug) burning off, keeping the strap clean. On a normal looking plug you want it burned clean into the bend of the sidestrap, you CAN go further, but i do not recommend it.
At Ricardo, we would conduct ignition timing sweeps in order to find the Minimum ignition advance for Best Torque (MBT), paying close attention to exhaust gas temperature especially when retarding as well as the stability of combustion
