@markus-w good shout, i use it every couple of months so ill give that a try as well.

@kevin
Don’t know about Legend...

Standard is 5j25 or 5j40. Don’t know if it’ll help you narrow it down? They both go with a Q2 needle valve though (tho the 5j40 is a Q2M)

@spookdog okay mate thank you , will have a play with it

For the carb use 0.5mm gasket paper and be very careful to the details.

The centre is usually a good colour, but it is only the very centre, electrode, ect. The ‘outer ring’ is always black and wet. No matter how it’s ridden. I removed the bottle top plug I have on the carb to filter rubber, to let more air in and the engine ran a lot better. Not proper but better...

@pablo13 said in Anyone got experience with power jets?:

The Mikuni website begs to differ "Kit may be installed easily on TM and VM series Motorcycle and Snowmobile carburetors."

The carbs that Yamaha use are not the same. They are made by Mikuni but they are made to order. The power jet has no ‘brass screw in’ adjustability. It’s just a casting. There are a few other differences like having heater pipes and lack of air~jet brass screw adjustability...

Actually, scratch that! I don’t think they have the weird angle/tilt to them that the Dtr does. That’s the problem, most carbs are level...

@spookdog Yes, they are used during dyno runs to ensure it's not detonating. I'd imagine it would need to be calibrated to a two stroke due to the smoke it burns.

I’m guessing that people are still running the power jets on their carbs when they state main jet sizes?...

@DtxPower Best jetting for Athena 170 is 300 main jet on the
standard Mikuni tm28 carb but with the powerjet blocked off. Just cut the rubber tube in half from the float chamber to the powerjet then block the 2 halves of the rubber tube with a couple of 5mm threaded bolts or similar.

@kevin
I want to go with a 2.0 or so. I don’t know the increment’s. I have a 2.5 fitted ATM...

@garth

link text

As for cleaning it, I admit I usually leave my carb alone as much as possible and leave it for those more experienced then I however cleaning it isn’t too hard.
If you can take the carb off yourself then locate someone with an ultrasonic cleaner and Chuck them a tenner, failing that go to your local bike shop.

However there are plenty of extremely detailed and fool proof tutorials on YouTube for the DT125R look this, courtesy of my favourite grumpy old git of a DT enthusiast, Frankie.
link text

@dtr-nsr Thanks for the input guys. It's a very interesting topic, which will have many viewpoints and will surely be a hot debatable one for many years to come!!! 😉

@jjay5947

Normally no but if you ride in very cold weather they prevent the carb from icing up, which in turn could result in the throttle sticking on

@theportingmaster

Thanks alot , just what i wanted to hear 👍 it narrows down the "to buy" list

where u running with or without powerjet circuit ?

@markus-w said in Air filter oil. Ram Air foam filter:

Hi all, my foam filter is a bit dry so I have order a can of filter oil but was wondering has anyone used any other type of oil just to get me going until my order arrives?

https://www.ebay.co.uk/itm/283683433382

One of my first purchases, comes with piper cross air filter cleaner and conditioner. £20 too. Bargain.

@Calum
okay, will do that later when the carb is complete

@SpookDog
yes the spring, rubber parts and piston are available at mikuni

mikuni topham should have it if its the mikuni carb