Very Smokie
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@Scootjockey the 2002 full power European model comes with a 240 main jet as standard, the restricted UK version has a 210. Is yours restricted? Also you seem to have the wrong idea of what a plug chop is. It's performed with a brand new plug. You don't ride around for any length of time, (no more than about 20 seconds) you then remove the plug and put your old one back in for the short ride home, (or push it back) and most importantly, you then take a hacksaw and 'chop' it. This video explains exactly how to do a plug chop. The chop is performed at around 8 minutes but I highly recommend watching the entire video.
https://youtu.be/Zx44uRFKRD8 -
@markus-w Hi the bike is a 2002 model 2003 plate French import 4BL chassis and engine numbers. 3MB00 Barrel and what looks like 3RM02 Carb. Once up to temperature I nailed it in 3rd 4th and 5th up to 8k Hit the kill switch pulled the clutch in and freewheeled to stop. Popped the plug out and checked the colour.
I’m not aware of it being restricted ? -
Fit a 240 main jet. I’m betting you have a .25 pilot jet (or should have) It made a lot of difference to engine note & temperament when I changed up from a 210 to the proper size...
Did you remove & clean the emulsion/needle jet tube? Mine was packed with silty-sand that blocked the holes. Also make sure the power jet is clear?...
I’ve had similar problems in the past with my full power 3rm02 carb’d bike. Make sure you bring the whole engine up to temp properly, not just the the top-end. Do a 15mile ride & keep to 6k running in!
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@Scootjockey well you shouldn't warm the plug up, should be brand new. and the clue is in the name 'chop'. Get a hacksaw and cut off the threaded part so you can read the white porcelain bit underneath. As I said, all is explained in the video.
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@Scootjockey the 2002 is mainly restricted by the reed switch in the back of the speedo.
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@SpookDog
From memory it is .25 pilot jet and yes I cleaned the emulsion tube. To be honest these weren’t that too bad just the bottom of the float bowl and floats were covered in a yellow silt. Which rubbed off fairly easily with some carb cleaner. I don’t have a 240 main jet yet and I’m waiting for his majesty’s finest to drop a set of assorted jets through the letter box. I took it out this morning to get some miles on it only taking it up to 5-6.5k. And it’s running nice I’m still very surprised how smooth it is. -
You need a 240 main jet then bud. It made a big difference when I upped mine from a 210, even though I thought it was fine before. I’d only use Mikuni Jets as well, maybe EBC at a pinch. I wouldn’t trust anything other than Mikuni really though...
Good luck with the bike. When they’re running proper they’re like nothing else. Full power 3mb dtr’s Are sweet
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@SpookDog they are okay, but there are a lot of damn sight better bikes. My ETX is dog slow, but the MX/RX/SX are lovely. Just a simple matter to convert mine.
The nice thing about DTs is they are dependable. I don't think my DT has ever let me down! It's gone wrong, but it has always got me home!
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I couldn’t find a Mikuni 240 jet for sale outside of the US of A! My bike seemed to run fine on a 210, but only in comparison to how it had run before, it had a 180 in it! With a 240 it really came alive in mid range torque (remember, it’s all comparative!)
I’m actually very interested in what your Dtr revs out to @ in gear, under load. I seem to reach my usable ceiling @ 7-8K
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@SpookDog
Now there’s some miles on it We’ve been opening it up a bit. Still running Kmh clocks and I kinda know they will be out but with me pushing 14 stone that’s close to 90kg in new money with jacket helmet boots n gloves it’s revving out in 5th and pushing 9.5k in top well into the 120-130kmh. So I’m well happy. One thing I am really pleased about is it’s still pulling past the power through the gears and it didn’t drop past 8k with a bit of an incline. I’m sure if I was 17 again weighing in at 10 stone wet it would be well into the red.
The exhaust tone from the full DEP just makes you want to blast it everywhere
