The BST-40 Bible

[meat popsicle]

Hey Derek,

when you get a breather in the discussion let us know where to get rebuild kits for the BST40 please. Maybe it's been posted, but right now it's the most useful question I can drum up.

[NordieBoy]

Originally Posted by meat popsicle

Hey Derek,

when you get a breather in the discussion let us know where to get rebuild kits for the BST40 please. Maybe it's been posted, but right now it's the most useful question I can drum up.

Don't get them from Suzuki that's for sure...

You'd think you'd ordered a complete carb at the price.

[motolab]

Originally Posted by meat popsicle

Hey Derek,

when you get a breather in the discussion let us know where to get rebuild kits for the BST40 please. Maybe it's been posted, but right now it's the most useful question I can drum up.

I don't know of one, but can put some together. Anybody got a spare carb I can borrow for a couple of days?

Regards,

Derek

[meat popsicle]

Originally Posted by motolab

I don't know of one, but can put some together. Anybody got a spare carb I can borrow for a couple of days?

Regards,

Derek

There's usually one floating around - if no one pipes up we can post the request in the "sign in" thread and such to get more attention.

I was expecting Sudco to have something, but they have nothing for the Mikuni BST series - is it some kind of an OEM deal with KTM and Suzuki?

[wrk2surf]

Ive got one.. wanna ride near yosemite??

[motolab]

Originally Posted by meat popsicle

There's usually one floating around - if no one pipes up we can post the request in the "sign in" thread and such to get more attention.

Cool.

I was expecting Sudco to have something, but they have nothing for the Mikuni BST series - is it some kind of an OEM deal with KTM and Suzuki?

I don't think it's Sudco's fault per se. All of the genuine Mikuni items that Sudco has and that are applicable to OEM also happen to fit Mikuni aftermarket carbs. It seems that Mikuni themselves are hesitant, for whatever reason, to sell any of the OEM specific items.

Regards,

Derek

[motolab]

Originally Posted by wrk2surf

Ive got one.

I'll PM you.

Regards,

Derek

[clintnz]

Originally Posted by NordieBoy

Don't get them from Suzuki that's for sure...

You'd think you'd ordered a complete carb at the price.

I went to the local Suzuki shop to price up the diaphragm, slide & slide guide, cos everybody knows that those exotic highly strung euro bikes have parts that are way expensive & impossible to get, but the good ol jap gear has parts that are always cheap & readily available right?

Suzuki did not sell the slide guide separately. The other bits were only available ex-Japan & were priced slightly higher than the same parts from KTM which were ex-Austria. An Auckland bike shop which imports Mikuni carbs & parts came out with slightly higher prices again, also ex Japan & were pretty vague about how long they might take to get here.

Cheers
Clint

[NICO]

Originally Posted by motolab

I'll PM you.

Regards,

Derek

I have an extra on the shelf as well. Lemme know if swing by SE Michigan is any easier for you.

Seriously, PM me if you need to borrow it. Small and easy to ship if need be.

[wrk2surf]

I thought this was 205.. http://www.advrider.com/forums/showthread.php?t=209040

I went the Oem way when everything wore out at about 30K.. New slide and holder , steinhouse screw..etc etc.. Its a good carb. Works great in big altitude changes... Now I think I have to put the side cover back on.. and remove the snorkel . I did the Vegas to reno race 2weeks ago and even with a crude pre filter the filter turned to adobe brick at about 100mi.. anyways Im gettin the backup to motolab (dont think the needle is in (go thru those like butter)..

[motolab]

Originally Posted by wrk2surf

I thought this was 205.. http://www.advrider.com/forums/showthread.php?t=209040

Dude said that he needed at least 50 commitments to proceed. I won't need that, and I will additionally be stocking the slide guides.

Regards,

Derek

[warewolf]

Originally Posted by meat popsicle

I was expecting Sudco to have something, but they have nothing for the Mikuni BST series - is it some kind of an OEM deal with KTM and Suzuki?

Yes. All BST series' are OEM-only carbs. Mikuni will not sell the parts for those carbs to third parties, presumably to allow the OEMers to recoup some development costs through inflated parts prices. Common bits like jets of course can be picked up anywhere.

So if you have a Hinckley Triumph, Suzi GSXR or DR you're < deleted > Neither Triumph nor Suzuki even list the throttle valve guide as a separate part - go check bikebandit or similar, it's quietly absent from the parts diagrams & listings, as already suggested. Only KTM sell that part the other two expect you to buy a whole new carb (every 4500miles according to motolab!! )

However; I have tracked down someone who managed to get hold of these bits for Hinckley Triumphs (BST36) so if you need some, send me a PM and I'll pass on their details. Note that Mikuni has already invited them to discontinue listing the part on their web site.

[motolab]

Originally Posted by warewolf

So if you have a Hinckley Triumph, Suzi GSXR or DR you're < deleted > Neither Triumph nor Suzuki even list the throttle valve guide as a separate part - go check bikebandit or similar, it's quietly absent from theparts diagrams & listings, as already suggested.

This applies to BST28 (Yamaha XJ600 Seca II/Diversion), BST33 (Aprilia Pegaso, BMW F650, Suzuki GS500E, Katana 600, DR350/750/800), BST38 (Cagiva Elefant 750/900, Ducati 600/750/900, Suzuki GSX-R750, Yamaha XTZ750, YZF750R, TDM850, TRX850 & FZR1000) and BST40 (Aprilia Moto 6.5, KTM 640 LC4, Suzuki DR650 & GSX-R1100. The applications list for BST36 can be seen at the bottom of www.moto-lab.com/gallery/view?itemid=262, www.moto-lab.com/gallery/view?itemid=263, or www.moto-lab.com/gallery/view?itemid=264.

However; I have tracked down someone who managed to get hold of these bits for Hinckley Triumphs (BST36) so if you need some, send me a PM and I'll pass on their details. Note that Mikuni has already invited them to discontinue listing the part on their web site.

I have them in stock.

Regards,

Derek

[Coho911]

The City I live in is at 3500 Feet, and where I ride most often goes up to 6000 Feet.

For those of you who also live at altitude (Like Denver CO or Salt Lake City UT) Can anyone advise me on whether or not I need a JD Jet kit, or if the stock needle will suffice with adjustments and a Jet ?

I am about to pull the carb out and adjust it, but want to have parts ready...

HELP ! My KTM asks for your experience !

[laramie LC4]

Originally Posted by Coho911

The City I live in is at 3500 Feet, and where I ride most often goes up to 6000 Feet.

For those of you who also live at altitude (Like Denver CO or Salt Lake City UT) Can anyone advise me on whether or not I need a JC Jet kit, or if the stock needle will suffice with adjustments and a Jet ?

I am about to pull the carb out and adjust it, but want to have parts ready...

HELP ! My KTM asks for your experience !

the stock needle will work fine. i used to ride from 5,00-12,000 ft with it. you notice some issues at the top, but thats just due to lack of O2.

laramie