- Posts: 68
- Thank you received: 0
Xt550 Build
- Racewayelko
- Topic Author
- Offline
- User
Keep it rubber side down everyone
Klx 110, TTr125, TTr250, 1982 kz750-N1 (Spectre), Xt-350 (soon to be the new home of a Kz550 engine )
Please Log in or Create an account to join the conversation.
- 650ed
- Offline
- User
- Posts: 15344
- Thank you received: 2829
The brass tubes on the carb holders are vacuum ports. These are the attachment points for vacuum gauges when synchronizing the 4 carbs. During normal operation they need to have rubber vacuum caps over them to prevent vacuum leaks. Speaking of carbs, since you plan to use pods rather than an airbox on those CV carbs you will need to go through the tedious drill of trying to find the magic formula for re-jetting the carbs. I suggest you use the "search" function on this site - just key in the word "pods" and you'll find 860 postings for the past 12 months and 6,813 earlier postings on the subject. There's a lot to learn, so prepare to become a carb expert.
Good luck with your project. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Please Log in or Create an account to join the conversation.
- loudhvx
- Offline
- KZr Legend
- Posts: 10868
- Thank you received: 1616
If the motor says Kz550A....... then the motor will use the Tk22 carbs, which are manual slide, and tune well without an airbox. That is what the motor looks like. You have a set of TK22 carbs on the bench, upper left side in the video. The pod filters for those will be smaller than the ones for the other, CV carbs you have there.
If the motor says Kz550D...... then it is a Gpz motor and uses Tk26 CV carbs. But the motor would have been all black and had a more angular look similar to your Spectre. (Also would have had oil cooler.)
You can't put Tk26 or Tk27 CV carbs on the earlier motors which came with the Tk22 carbs because the manifold bolt spacing is too tight.
My signature has links to Tk22 info, and a lot of Kz550 info. Read the valve train warning before doing anything with the valve covers.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.
- Racewayelko
- Topic Author
- Offline
- User
- Posts: 68
- Thank you received: 0
@hvx I have looked at some of your stuff in the past few days, I am confident in my clymer manual and the communities knowledge, The biggest fear I have at this point is going to be the wiring. I am good with the engine mounts because i can cnc plamsa cut some at my school (home of the first high school chopper class). Frame bracing is going to be another issue for me, the only issue is going to be where to brace it at? I really don't feel like putting my mind on making the force vector charts to do so, that would be a lot of trig and with my class/work load i am pretty stretched thin.
Keep it rubber side down everyone
Klx 110, TTr125, TTr250, 1982 kz750-N1 (Spectre), Xt-350 (soon to be the new home of a Kz550 engine )
Please Log in or Create an account to join the conversation.
- Racewayelko
- Topic Author
- Offline
- User
- Posts: 68
- Thank you received: 0
Keep it rubber side down everyone
Klx 110, TTr125, TTr250, 1982 kz750-N1 (Spectre), Xt-350 (soon to be the new home of a Kz550 engine )
Please Log in or Create an account to join the conversation.
- 650ed
- Offline
- User
- Posts: 15344
- Thank you received: 2829
Racewayelko wrote: I looked and the motor is the kz750 A motor. I do have a question though, I have once IC ignitor, I am missing the ignition control unit (I believe) Unless it is the Ic Ignitor. Then I am fine. Will I have any issue with editing out certain functions? (I.E. hazzards)
What's a 750 A? Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Please Log in or Create an account to join the conversation.
- Racewayelko
- Topic Author
- Offline
- User
- Posts: 68
- Thank you received: 0
bwahaha sorry about that :facepalm: long day at work It is the 550 a motor I am so used to typing kz550-n1 from my spectre that it is muscle memory. you think I will have an issue with those slide carbs? I suppose I will have to play with the a/f mix. I do know from previous owner that he was having trouble with the #1 cyl. something to look at when I get it running though650ed wrote:
Racewayelko wrote: I looked and the motor is the kz750 A motor. I do have a question though, I have once IC ignitor, I am missing the ignition control unit (I believe) Unless it is the Ic Ignitor. Then I am fine. Will I have any issue with editing out certain functions? (I.E. hazzards)
What's a 750 A? Ed
Keep it rubber side down everyone
Klx 110, TTr125, TTr250, 1982 kz750-N1 (Spectre), Xt-350 (soon to be the new home of a Kz550 engine )
Please Log in or Create an account to join the conversation.
- loudhvx
- Offline
- KZr Legend
- Posts: 10868
- Thank you received: 1616
I don't think the KZ550A has a hazard function, but if it does, it won't be related to the ignition.
The slide carbs will work fine once they are jetted properly. If the motor had issues, you will want to do a compression test and leakdown test, and check the valve lash.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.
- Racewayelko
- Topic Author
- Offline
- User
- Posts: 68
- Thank you received: 0
Also, is there a kickstart that I could put on? I trust my legs more than I do the electrical lol I like riding in cold weather and I can kick longer than the battery can turn the starter CHeers
Keep it rubber side down everyone
Klx 110, TTr125, TTr250, 1982 kz750-N1 (Spectre), Xt-350 (soon to be the new home of a Kz550 engine )
Please Log in or Create an account to join the conversation.
- loudhvx
- Offline
- KZr Legend
- Posts: 10868
- Thank you received: 1616
Racewayelko wrote: What do you guess I will have to go up on jets? 5 sizes over stock or is that a bit much?
Also, is there a kickstart that I could put on? I trust my legs more than I do the electrical lol I like riding in cold weather and I can kick longer than the battery can turn the starter CHeers
I don't think there was ever a kickstart option on the Kz400-4 / Kz500 / Kz550 / Zx550 / Zr550 line of motors. They are pretty easy to bumpstart, though.
Stock jetting had 92 mains, 32 pilots, and the needle was clipped at the equivalent of the second groove down from the top on the adjustable needles. You can get adjustable needles in most rebuild kits.
With pods and a 4-into-1 pipe, I would start with
96 mains. Might go up to 98.
34 pilots. Will likely go up to 37.
4D93 needles at 3rd clip (middle clip).
Air screws at 1-1/2 out.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.
- Racewayelko
- Topic Author
- Offline
- User
- Posts: 68
- Thank you received: 0
6, 5, 7, 8,
So I don't know what that is about you would think they would go in order. But back to the meaning on this post, should I put the gpz motor in xt frame and return the kz550 to stock and fix the motor from there? Everyones thoughts?
Keep it rubber side down everyone
Klx 110, TTr125, TTr250, 1982 kz750-N1 (Spectre), Xt-350 (soon to be the new home of a Kz550 engine )
Please Log in or Create an account to join the conversation.
- loudhvx
- Offline
- KZr Legend
- Posts: 10868
- Thank you received: 1616
Also, you can't mix and match caps from motor to motor. they are machined in place on one motor, and should stay with that motor in the correct position. If you are lucky, sometimes you can find ones from another motor that will work. basically you put the caps in place without the camshaft and try to feel if there is a ridge where the caps meet the head, in the opening where the cam journal would be.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.