new member new bike need some tech help/ advice

[proddy2008]

hi everybody out there iv been lookin at this site sence iv finaly had time to get back on projects and i figured its winter now (ok i live in houston we probably will differ in what "winter" means) anyhow iv decided to go with a cafe racer theme and try to make it as fast as possible ( lots of time no money) currently im getting it preped for paint but im getting parts together for the first mods heres my plans first off i hate trying to re engineer what somebody did 40+ years ago so im going to use a msII v3.0 to controle spark untill i can get everything together for full efi conversion i will be using gm coil near plug coils off a truck or ls2 just a quick couple of q's iv got right now iv got the bike completely striped down exept the dam tripple tree dam thing wont come off any ideas? (top part is off which i need a bolt for anybody know where i can get one cheep?) and whats the best way to get crank signal to the ms box?

[natemoen]

Welcome to the site! There are at least 2 guys on the forum that have done the efi switch, 81xsproject and shappers (think that's his name at least). I would try to get hold of them for specifics.

As to the crank signal, you will need to make some sort of reluctor wheel that mounts to the crank under the left side timing cover and then use some type of sensor to reed the wheel. The wheel would have to have notches in it to signify the position of the crank. I might be wrong about some is the details but that some of what is needed.

[proddy2008]

hmmm ok so reluctor wheel and intake are going to be the main things im going to need to machine... im hoping that a gm tpi fuel rail is going to have the right spacing to save some time/money also gotta figure out if puting the o2 sensor on just 1 side will be ok (i dont see y it wouldnt be)

[gareth]

Stan the Man.

http://users.hal-pc.org/~dhutch/


This should help a lot. It was a very impressive build with a lot of XS-specific trouble-shooting.

[proddy2008]

friggin awsome link i will deffinately save it hmmmm thinkin about intake... does anybody think a tb from a mid 80s camaro tpi would be to big? i know iv got a couple scatterd around houston lol

[proddy2008]

ok wow so iv been doing nothing but research sence last post on this and their are a couple of things iv decided. the gsxr 600 tb's will work allot beter than making my own intake from gm parts and look btr than i could do lol so i will go with those, for a fuel pump i will most likely use a tpi 350 in tank from a camaro in a kind of resivoir type thing pretty easy about the size of the busa pump easier to source and replace lol and cheeper (read freeish) now iv been trying to figure it out and i cant seem to come across the info. will the ms be able to do individual coil per cylender or am i stuck with a wasted spark system?(i dont think anything should be wasted it just doesnt sit well with me) im fairly certain that it will do sfi am i right oh and what is the firing order on these bikes? and any advice for the tripple tree?

[fredintoon]

ok wow so iv been doing nothing but research sence last post on this and their are a couple of things iv decided. the gsxr 600 tb's will work allot beter than making my own intake from gm parts and look btr than i could do lol so i will go with those, for a fuel pump i will most likely use a tpi 350 in tank from a camaro in a kind of resivoir type thing pretty easy about the size of the busa pump easier to source and replace lol and cheeper (read freeish) now iv been trying to figure it out and i cant seem to come across the info. will the ms be able to do individual coil per cylender or am i stuck with a wasted spark system?(i dont think anything should be wasted it just doesnt sit well with me) im fairly certain that it will do sfi am i right oh and what is the firing order on these bikes? and any advice for the tripple tree?

Hi Proddy and welcome,
seems you are concentrating on boosting your bike's power?
OK, fine, but the stock engine power will already drive the machine about 20mph faster than the brakes and handling can safely handle.
Best you look at improving those features too.
The lower triple tree is held in place by the two notched ring nuts that are directly under the upper 'tree.
They are threaded onto the steering stem and also adjust the head race bearings.
The top ring nut locks the two together and needs to be undone first.
Once the ring nuts are no longer locked together they will spin off easily so you can lift out the upper tapered roller bearing and the steering stem and lower 'tree will drop out on it's own complete with the lower tapered roller bearing.
Note that the outer cones of both races are a light press fit so they will stay in the steering head.
Us bodgers will tap the ring nuts loose with a hammer and a steel punch but someone not wanting to damage the wrench notches will use a pair of spanner wrenches (AKA peg wrenches or C-spanners) instead.

[proddy2008]

On the tripple tree thats what i feard they do not want to seperate gotta find someone with a bigger hammer/ spaner wrench not realy looking for more power as of yet lol btw whats a good upgrade for the breakes?

[crazy steve]

...what's a good upgrade for the brakes?

For a Special, not a whole lot. Braided stainless steel lines, new pads that best reflect your riding style, and maybe drilled or slotted rotors (slotted were used starting in '80). And probably most important, making sure they work their best by removing, disassembling, cleaning and reassembling. The brakes on these don't generally do well if neglected (I've got one in the shop right now that the PO had a sticky caliper on, and he melted the caliper by the time he got it home..); these aren't best best brakes anyway, so it's good if they work as well as they can.

Good luck!

[proddy2008]

Ok deffinately going to rebuild everything I can probably have everything built before I finish sanding the dam thing lol soooo who knows if ms can do coil on plug? Or on the other hand if a gm 411ecu can controle a 4 banger?

[natemoen]

There is another option for the brakes but it would cost quite a but more and would require you switching to a standards triple tree and forks. Brembo makes a brake kit for the xs650 and that would fit the xs11. As I said though it only works with the standard forks. I have not looked into it all that much so o don't know all the details. You can check it put here:
http://Www.650central.com/ just look under the brakes section.

[proddy2008]

Been busy at work lately thx for the link on the breakes I'll hafta gvet into that when I get it back from paint as far as cop goes iv found I need a crank signal which we already coverd and a 1x cam signal which I'm still thinking about how to do maby a sprocket on top of the timing chain?

[crazy steve]

There is another option for the brakes but it would cost quite a but more and would require you switching to a standards triple tree and forks. Brembo makes a brake kit for the xs650 and that would fit the xs11. As I said though it only works with the standard forks. I have not looked into it all that much so o don't know all the details. You can check it put here:
http://Www.650central.com/ just look under the brakes section.

That Brembo upgrade is only new rotors, and at $265 each, rather pricey. If you really want better brakes, look into a complete fork swap. Swapping to 'standard' forks (with their 'conventional' caliper mounts) opens the door to adapting better calipers off a later bike, or even doing a later-model fork set that already has better brakes.

[natemoen]

That Brembo upgrade is only new rotors, and at $265 each, rather pricey. If you really want better brakes, look into a complete fork swap. Swapping to 'standard' forks (with their 'conventional' caliper mounts) opens the door to adapting better calipers off a later bike, or even doing a later-model fork set that already has better brakes.

Never really looked all that close, someone else had mentioned it once and I saw the price and just ignored it at that point.

[proddy2008]

Ok heres what im thinking to get 1x cam signal...extend the end of one of the cams outside of the valve cover and mount a 1x reluctor wheel to it and for 24x either do it like everyone else has been doing their crank signal or put it with the cam via timing chain what do yall think?