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Which alternative carburetor? (Read 17 times)

mpescatori

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Which alternative carburetor?
11/18/05 at 03:02:31

Hi all, I'm looking for a bolt-on replacement for my carb while I have it serviced, and I've seen this ad on ebay.it, is it a good alternative to the stock Mikuni? Or is it exactly the same?

MIKUNI depression CARBURATOR model BST40
It seem new and never used; i don't have a motorbyke, so i never used it. It seem in very good condition, as yoo can see in the following images. It was never dismounted nor hacked in any way. One of the pipe in it has an original plastic cap that close it.
Data on the carb says: BST40 237 A K562

Or would a Mikuni 37mm off a DR400 enduro be a better choice? Or a Dell'Orto 35?
...or TWIN Dell'orto drla 36 carbs off a Beetle Grin

Maurizio

Maurizio Pescatori, Esq.
Gentleman Rider

Mikuni BST40, K&N filter, Stage2 cam, Verslagen tensioner, Sportster muff, 120 proof moonshine, Pirelli MT 66 tourers... and a chain conversion too !

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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10875 Oklahoma Gender:	Re: Which alternative carburetor? Reply #1 - 11/18/05 at 18:33:13 The BST 40 is the stock CV carb, isn't it?
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Savage_Rob Serious Thumper Alliance Member Offline Mechanically Inclined Amateur Posts: 6972 Texas (Dallas area) Gender:	Re: Which alternative carburetor? Reply #2 - 11/18/05 at 19:14:10 The BS40 is the one used on the Savage/S40. The BST40 is used on the Suzuki DR650 as well as an Aprilia and a KTM and it does look different. See this exploded view
Back to top	1998\|MAC muffler\|ceramic coated header\|K&N air filter\|Amal Mk2 carb\|Odyssey battery\|iridium plug\|NC windshield\|Dunlop 491s\|Superbrace\|EBC brake rotor\|12.5" Progressive shocks\|Kuryakyn ISO grips IP Logged

Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Which alternative carburetor? Reply #3 - 11/18/05 at 19:43:35 Way different carb and $3 cheaper on crotchrocket bst40 $306 bs40 $309
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mpescatori Serious Thumper Offline Romanum Thumperium Cavalco, yeaaah !!! Posts: 3547 Rome, Italy Gender:	Re: Which alternative carburetor? Reply #4 - 11/19/05 at 01:40:26 Well, I just lost the Dell'Orto 36 for... fifty cents!!! The auction for the BST40 is going for 19.90, I upgraded my bid to 51... ...let's see how the auction goes Maurizio
Back to top	Maurizio Pescatori, Esq. Gentleman Rider Mikuni BST40, K&N filter, Stage2 cam, Verslagen tensioner, Sportster muff, 120 proof moonshine, Pirelli MT 66 tourers... and a chain conversion too ! IP Logged

mpescatori

Serious Thumper

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Romanum Thumperium
Cavalco, yeaaah !!!

Posts: 3547
Rome, Italy
Gender: male

Re: Which alternative carburetor?
Reply #5 - 11/23/05 at 14:13:01

Well, the auction's over, I've just won a (claimed) new old stock Mikuni BST 40 for a whopping E.30.50c, which is roughly $35.
So compared to the selling rate quoted by Reelthing it was a steal more than a bargain !!! Grin

Hoping this wasn't an impulsive purchase, how much improvement is there between the BS40 and the BST40? I understand the BST is an evolution of the BS, and Savage_Rob explains it is used on the DR650 (slightly different engine, and certainly more power) so what is there to be gained? Snappier response? Less fuel economy in city driving but crisper throttle on the twisty bits?

Anyone?

By the way, I also won that 8" round air filter w/housing, which I'll fit on the right side, where the air box lid is, should look nice and leave room for a proper tool box under the seat.

Maurizio

Maurizio Pescatori, Esq.
Gentleman Rider

Mikuni BST40, K&N filter, Stage2 cam, Verslagen tensioner, Sportster muff, 120 proof moonshine, Pirelli MT 66 tourers... and a chain conversion too !

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Jim_R Ex Member	Re: Which alternative carburetor? Reply #6 - 11/23/05 at 14:44:44 lets just hope it doesnt flood the engine I think ull prob get better preformance out of it and Ill be jealous lol 8)
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