@Arild said in Best Big Bore Kit DTR:
@RubberSalt youve told me most of this as answers to all my questions, still my mind ends up blown after reading this its alot of good information to take in, or try to atleast
Thanks for putting all that together
Well this is all rather very interesting, very very interesting indeed...
After reading that that I might even scrap my plans of a 200 after reading this and seeing what was once an idea become something of a possibility and with both a 4DL setup and 4FU setup spare it’s not like I haven’t got ammo. I haven’t mentioned this either but I also have a spare 4DL head. More ammo?
Also @RubberSalt I have as much to learn as I believe you have to offer. Very well written, whilst I admit it’s out of my depth (at the moment) it’s still easy enough to follow. I also use my phone so I know it can be a pain sometimes. Me and @Arild met the same way you did and had been chatting for a while now, helping each other out and talking about the unexplored possibilities for the DTR so I just got to say welcome aboard and thanks from me and on behalf of my little Swedish g. I appreciate you helping him out a lot, I could honestly only wish to be able to do what you have
Anyways I do believe this could be quite a most interesting endeavour.
Engines back in the day didn't use to have balancer shafts.
Obviously it's going to have a dramatic effect on bearing life and, since there are no rubber engine mounts, a dramatic increase in vibrations through the handle bars. It becomes quite unbearable after a short amount of time.
I would say there are better things you could do to increase performance of the engine over removing the balancer shafter, like lightening the flywheel.
Yeah, the cables are clearly numbered 1 & 2. In my case they didn’t match up. I had to cut some outer off of one as well, to make it fit and work. unbelievable!
Getting the power valve fitted and the servo working was like one of the biggest mine-fields since the Somme ️
@Calum I'll take a picture of the head I've got, it's stamped 3MB but it's the one with the ridged, I'll have a look at the book cheers
I planned on skimming the deck down at the end to create slightly higher compression than standard ideally
@Glynn123 yeah but I’ve heard loads over the years about what you have to do to push the bikes without getting it impounded but the problem is practices change from one police branch to another and my specific police impound no matter what they essentially do what they want all of the main criminals and such have the police payed off so there’s no way I’d chance a near 2 grand bike)
the 2003 was easy to derestrict the standard 3rm-20 cdi I actually found very good. Restrictions were the standard exhaust and the reed switch in the back of the speedometer. They came with the powervalve from factory unlike some other years which I can't believe they did fit servos! Back when mine was 125cc it would destroy an 1990 DTR
@sgt-robuck-5 Don't forget the ignitech @Darty rates them.
I used Zeel because it came recommended to me.
I will be buying zeel for my upcoming project.
I've had problems with them, I contacted them and they sorted it out no quibbles.
Peace of mind.
Oh dear, back on topic anyhow....Let us know how you get on with the PV. If it still struggling then it would sound like it's still restricted and needs sorting ASAP! 2003 models were the WORST for restrictions!
2strokes in general is jetted plenty rich, to make sure they dont seize.
I run my 94 R with snorkel removed, and the airbox opened slightly more.
Stock mainjet, and half a notch leaner on the needle. The mainjet is still plenty rich.
Stock header, and aftermarked end can, otherwise stock.