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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> What is my carb type /cgi-bin/YaBB.pl?num=1147079084 Message started by Lion on 05/08/06 at 02:04:44 |
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Title: What is my carb type Post by Lion on 05/08/06 at 02:04:44 I don't know what my carb type is but I need to know it because of the rejetting. Is it a mikuni or what? So can you figure it out? Here are the pictures of my carb: http://members.chello.hu/szep.tamas/carb/index.htm Sorry for the dirt and oil... The other question is that does the Keihin jet fit it. My local Harley dealer has jets only for Keihin carbs. I read here that they probably fit: http://suzukisavage.com/cgi-bin/YaBB.pl?board=RubberSideDown;action=display;num=1112018085;start=2#2 |
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Title: Re: What is my carb type Post by babbalou on 05/08/06 at 02:45:08 It's a Mikuni BS40. I don't know if Keihin jets would fit, never tried it. |
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Title: Re: What is my carb type Post by Lion on 05/08/06 at 04:06:11 babbalou wrote:
Thank you a lot. Meanwhile I found another company who deals Mikuni stuff. I will contact them today. |
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Title: Re: What is my carb type Post by Reelthing on 05/08/06 at 05:49:52 do you know the main jet size the ls400 has stock? - might should drop the bowl and pull the jet to find out |
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Title: Re: What is my carb type Post by Lion on 05/08/06 at 06:49:00 Reelthing wrote:
Unfortunatelly not (yet). I am going to find out it this weekend. |
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Title: Re: What is my carb type Post by lancer on 05/08/06 at 07:00:39 According to the book, the physical measurements of the jets are different (Mikuni vs Keihin), and then the numbering system for the jet orafice size...I have no idea whether they are even close or not. I do know that the numbering for Amal jets are not the same as the Mikuni. |
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Title: Re: What is my carb type Post by Lion on 05/08/06 at 07:10:15 lancer wrote:
Which one? However I don't have any except the user manual. |
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Title: Re: What is my carb type Post by Reelthing on 05/08/06 at 07:12:42 Lion wrote:
and do remember the jet has a washer under it that likes to fall out and go under the starter - put a towel over the starter any time you're doing work on the bike. also the screws that hold the bowl on are very soft - use a good phillps and a lot of presure to break these lose or they will strip out, and replace them with stainless allen head. |
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Title: Re: What is my carb type Post by lancer on 05/08/06 at 19:56:44 Lion wrote:
The book I spoke of is the Sudco dealers manual/catalog. If you are looking for a book to use at home there is the Sudco/Mikuni Tuning Manual...an excellent source for carb theory and practical jetting/tuning information, parts, diagrams...it is "step 1", in the "12 step program". The book can be found on ebay. |
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Title: Re: What is my carb type Post by Lion on 05/08/06 at 21:09:46 I am not a great mechanic but hopefully I can do the rejetting myself. As I did the seat mod yesterday in 1/2 hour. Which book do you recommend to buy _generally_? Clymer? Anyway I ordered the 152.5 main jet. And discussed the choke knob problem too with tha dealer who is a Mikuni specialist. |
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Title: Re: What is my carb type Post by Reelthing on 05/08/06 at 21:43:40 well you see the 152.5 is only 3 jets bigger than the stock 145 main jets these US ls650s have stock - but some of the euro bikes have like a 125 main - so the 152.5 world be like 10 or 11 sizes bigger - not good. So you need to know what the ls400 has in there before you plan on doing the swap |
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Title: Re: What is my carb type Post by Lion on 05/08/06 at 23:46:07 My bike is from Japan (if it matters). I mean that is made for Japan and was importes as used from there. How can I determine the size of the jet? Is it written on it? |
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Title: Re: What is my carb type Post by Reelthing on 05/09/06 at 05:28:31 around here the problem is the ls400 is quite rare just 2 of you I think so how they came stock is not known. the size will be stamped on the top - and if you are a old geezer like me it takes my glasses and some very good light to be able to see it - 150 Mikuni large round http://www.sturgisswapmeet.com/images/products/large/42-1680.jpg |
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Title: Re: What is my carb type Post by Lion on 05/09/06 at 23:08:17 ;D 20 years now as a programmer and still not need glasses. But my eyes are always burned, sometimes watery. Yesterday I tried to remove the bottom of the carb but those 4 bolts were so stucked I couldn't unscrew them. I think they weren't moved for the 10 years since my bike was made. That's a pity. Even with an L shaped screwdriver they didn't move. |
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Title: Re: What is my carb type Post by Reelthing on 05/09/06 at 23:27:38 Me too, wrote 360/370 assembler for about 15- it was the next 15 that did the eyes in - or perhaps the other side of 50. you may need to remove it so you can enough pressure on the screws with a phillips bit to break them lose |
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Title: Re: What is my carb type Post by Lion on 05/10/06 at 01:46:37 offtopic start I like assembly language: no strange behaviours, mysterious bugs, mostly everything is black or white. You do something well or bad, no other ways. offtopic end I am gonna ask a mechanic to do the loosening for me. I don't want to break anything :) |
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Title: Re: What is my carb type Post by Savage_Rob on 05/10/06 at 07:00:38 /* More Off-Topic */ Self-taught programmer and way out of practice... learned in procedural C and Assembly, then later picked up some OO with Object Pascal and C++. I also got into some Plex-C and Eri-Pascal working on Ericsson switches. Assembly is also used there. It started 15 years ago, when I learned to write utilities to make life easier as a switch tech but that was mostly a UNIX and DOS world. With more and better canned programs, I've since faded to being a user for the most part. It is interesting to have a clue when others talk about coding though. |
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Title: Re: What is my carb type Post by Reelthing on 05/10/06 at 08:19:33 Dang if I didn't pull this thread into the gutter.... I think I can still write object code for 360/370's - you can't compile new o/s while it's running - got to zap (as in modify memory not to be confused with the Zero and Add Packed instruction) that puppy and the 6502 chip - man what a nightmare that one was - a whoping x and y register and the accumlator if you needed to do something fancy like add ::) come back reelthing! - man the dark side almost got me.... |
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Title: Re: What is my carb type Post by Lion on 05/11/06 at 03:42:00 New info: I asked a mechanic (as I mentioned) to unscrew those 4 bolts on the bottom of the carb. We had to remove the seat and the accumulator with it's box. We used some unscrew-spray (or how do you call it) and some cautious hammer knocking on the bolts. Finally they came out so I could check the main jet. And the size is: 132.5 !!! What?? :o ;D So what size jet do I need to upgrade it to? |
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Title: Re: What is my carb type Post by lancer on 05/11/06 at 04:02:21 Get several, starting with the #135, and work from there. The idea with the main jet is to have as large as possible without running it too rich. "Too rich" will be when the bike starts to choke down at full throttle. When that happens go back down one size jet. That should then get you the highest speed at full throttle when compared to any other size main jet. |
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Title: Re: What is my carb type Post by Lion on 05/11/06 at 12:35:37 I ordered a 135 and a 137.5 one. |
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