DR650 BST40 mikuni CARB pimping and needle tapering *DYNO Results added*

[Matie spero]

ok, jyt nou mooi vertel van die bande die bash plate en die omgewing, maar nie veel oor die naald...
hahaha!!!

eks jaloers, daai lyk soos my tiepe ry!!!!!!!!!!

[chopperpilot]

My iPad gooi heeltyd 'n "error" uit as ek die thread wil oopmaak. (Nou op my PC. )

Sal die naweek kyk of ek die "performance" naald kan uithaal, en 'n foto neem met 'n OEM naald, om die fisiese verskil aan te dui.

[chopperpilot]

Herewith a short write-up on the performance of my DR, after I fitted the "Matie Spearo Tapered Needle".


I never wanted to modify my air box, and only had a performance canister fitted, with jetting done. Did not even had the snorkel removed!

Matie Spearo offered to hand taper me an OEM DR needle. He burnt the midnight oil for a few nights! Thank you Matie!

Before I fitted the tapered needle, I removed the snorkel and drilled a 50mm hole next to the snorkel's hole.

I previously had a 150 main jet in, needle on the 3/5 position, 42,5 pilot and airscrew about 1,5 turns out.

When I fitted the tapered needle, the engine, when started immediately felt different, as if a beast was unleashed withinin  it. The idling was however slightly rough.

Matie initially advised me to retain the 150 main jet, as the thinner tapered needle results in an enriched mixture.

Matie advised me to fit a 45 pilot, which I had at home, and turn the airscrew 2.5 turns out, to improve the idling.

That done, I took it for a quick spin at night around the block. It definitely felt stronger, but I expected a bit more.

That Friday, I joined a few other riders for a 3 day ride in Swaziland. This was the first time I could really assess the modifications on the DR.

I don't wheelie the DR, except in the veld, where with the aid of a small bump I can lift the front wheel.

With the tapered needle I was expecting an improvement in the bottom to mid range. With the pull away at Jeppes Reef Border Post, the border personnel dared me to lift the front wheel. To my own amazement it came up under power with ease !

Accelaration has vastly improved, and 120 cruising is at about 1/2 throttle.

When cruising at 140km/h, twisting of the throttle results in immediate acceleration.

It cruises at 140km/h with ease.

It was ridden quite hard in Swaziland, but my fuel consumption came to 15.5km/l.

I am sure that at a constant 120km/h cruise it will achieve 20km/l.

I am thrilled with the new-found performance of my DR!

I have 2 DRs, and wondering if Matie would taper me a 2nd needle?

 

[Matie spero]

Herewith a short write-up on the performance of my DR, after I fitted the "Matie Spearo Tapered Needle".


I never wanted to modify my air box, and only had a performance canister fitted, with jetting done. Did not even had the snorkel removed!

Matie Spearo offered to hand taper me an OEM DR needle. He burnt the midnight oil for a few nights! Thank you Matie!

Before I fitted the tapered needle, I removed the snorkel and drilled a 50mm hole next to the snorkel's hole.

I previously had a 150 main jet in, needle on the 3/5 position, 42,5 pilot and airscrew about 1,5 turns out.

When I fitted the tapered needle, the engine, when started immediately felt different, as if a beast was unleashed withinin  it. The idling was however slightly rough.

Matie initially advised me to retain the 150 main jet, as the thinner tapered needle results in an enriched mixture.

Matie advised me to fit a 45 pilot, which I had at home, and turn the airscrew 2.5 turns out, to improve the idling.

That done, I took it for a quick spin at night around the block. It definitely felt stronger, but I expected a bit more.

That Friday, I joined a few other riders for a 3 day ride in Swaziland. This was the first time I could really assess the modifications on the DR.

I don't wheelie the DR, except in the veld, where with the aid of a small bump I can lift the front wheel.

With the tapered needle I was expecting an improvement in the bottom to mid range. With the pull away at Jeppes Reef Border Post, the border personnel dared me to lift the front wheel. To my own amazement it came up under power with ease !

Accelaration has vastly improved, and 120 cruising is at about 1/2 throttle.

When cruising at 140km/h, twisting of the throttle results in immediate acceleration.

It cruises at 140km/h with ease.

It was ridden quite hard in Swaziland, but my fuel consumption came to 15.5km/l.

I am sure that at a constant 120km/h cruise it will achieve 20km/l.

I am thrilled with the new-found performance of my DR!

I have 2 DRs, and wondering if Matie would taper me a 2nd needle?

 

Thanks Chopper!!!!!!

then I believe you experienced what I experienced, after I made the mod, took it from a reasonable bike to a beast!

I am extremely happy that your happy!!!!!

if I can take you back to a conversation we had way back:

But matie why do you want to do all of this?
my DR runs like a dream, what do you want to do with any more?
mine just spins etc...

That grin factor you explained..... that is exactly why!!!!

Enjoy!!!!!

[chopperpilot]

Matie Spearo

Nogmaals dankie vir jou moeite met die naald!

Ek kan nie glo dat die naald en die oop air box so 'n groot verskil maak nie.

Ek het nog steeds die "back-fire screen" met die OEM filter. Hy kry nou 'n TwinAir.

Nou nog net die suspensie verbeter!

[chopperpilot]

Besig om die DR te diens vir die volgende avontuur.

Ek wys 'n paar fotos van my mods.

Airbox



Die "Cutex" botteltjie is eintlik touch-up verf. Werk goed om die carb breather waterdig te hou, terwyl die DR gewas word!


Sent from my iPad using Tapatalk

[chopperpilot]

Die lugfilter na die vorige 3 dag Swazi avontuur.




Sent from my iPad using Tapatalk

[chopperpilot]

Die carb se breather. Ek het 'n stukkie van 'n ou DR spons lugfilter rond gesny. Ek spuit dit met die rooi filter olie. Blyk baie effektief te wees!



Die "swastika" is die breather se oorspronklike "retainer" wat ek uitgehaal, en effens ge-"trim" het, om die sponsie in posisie te hou.


Sent from my iPad using Tapatalk

[chopperpilot]

Carb wat skoon is.






Sent from my iPad using Tapatalk

[chopperpilot]

OEM needle and the Matie Spearo Hand Tapered Special Edition High Performance needle.

Yes, very different, and a huge difference in performance!




Sent from my iPad using Tapatalk

[chopperpilot]

Lecap, please don't comment. We are aware of what you advocate.

Spark plug.



It looks lean, but has a light grey colour.


Sent from my iPad using Tapatalk

[chopperpilot]

My bikes are thoroughly cleaned after each adventure.




Sent from my iPad using Tapatalk

[Kykdaar]

  Bly om te sien ek is nie die enigste wat glo in n silverskoon DS bike nie

[Candyman]

,yay,I



Sent from my iPhone using Tapatalk

[chopperpilot]

Kykdaar

Siende dat Matie Spearo seker met verlof is, want hy lewer geen kommentaar hier nie, post ek maar nog 'n silwerskoon DS vir jou!




Sent from my iPad using Tapatalk

[Kykdaar]

  Ja die mannetjie was nie by die werk vandag nie. Gippo weer lekker

Wat gebruik jy om hom so mooi skoon te kry? Ek sit ure lank met n tandeborsel en paraffin en speel.

[chopperpilot]

Die fiets is geplak met VPS.

Word afgespuit met water met Gardena spuitstuk.

Spuit 50/50 Prepsol/water mengsel met spuitkannetjie.

My tuin ingenieur sit langs die fiets met 'n verfkwas, spons, lap en emmer met gewone karseep. (Wash & Wax)

Moet ook byvoeg dat die fiets nuut gekoop is, en nog nooit omgeval het nie. Amper 7000 kms, 2012 model.

Was goed van die modder na die langnaweek se Mariepskop grondpad rit. My vrou was saam, en my vriend op sy 1200 LC GSA.

As ek 'n nuwe (2de handse) fiets koop, bring ek 'n houer met ou petrol en paraffien nader. My tuin ingenieur ken al die ritueel.


Sent from my iPad using Tapatalk