- Posts: 78
- Thank you received: 0
Selecting the right pilot jets
- thadley55
- Offline
- User
- TWO WEEKS!!!(Money Pit the movie)
ThanxB)
1975 XL125 Honda first bike
1993? VTR 250 Honda gone
1983 LTD 440 Yammy gone
1988 CBR 600 Honda gladly gone!!
1976 KZ900 daily driver
Please Log in or Create an account to join the conversation.
- toadson
- Topic Author
- Offline
- User
- Posts: 204
- Thank you received: 1
According to a manual I found for my carbs, there are a few things to try to see if your pilots are too small. It says to turn the grip a little under no load and see if the engine revs smoothly, if not, the pilots are too small. It also says if you cannot maintain a steady speed between 12-25 MPH that your pilots are too small. I assumed mine were too small because it will not start cold without the choke fully applied, revs very rough until it is warmed up, and if I try to maintain a speed of 25 mph, I will have a little bit of misfire. You might also want to try adjusting your air screws to see if that could help you out.
79 KZ1000 LTD. Mikuni VM26 w/ accelerator pump. 4 into 1 header. Stock intake setup. GS1100 Swingarm, My swap thread: kzrider.com/index.php?option=com_kunena&...d=5&id=210872#210872
Please Log in or Create an account to join the conversation.
- timebomb33
- Offline
- User
- Posts: 4288
- Thank you received: 10
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
Please Log in or Create an account to join the conversation.
- thadley55
- Offline
- User
- TWO WEEKS!!!(Money Pit the movie)
- Posts: 78
- Thank you received: 0
ThanxB)
P.S. This is a 76 kz900
1975 XL125 Honda first bike
1993? VTR 250 Honda gone
1983 LTD 440 Yammy gone
1988 CBR 600 Honda gladly gone!!
1976 KZ900 daily driver
Please Log in or Create an account to join the conversation.
- kano
- Offline
- User
- Not Another Bloody Limey!
Please Log in or Create an account to join the conversation.
- thadley55
- Offline
- User
- TWO WEEKS!!!(Money Pit the movie)
- Posts: 78
- Thank you received: 0
1975 XL125 Honda first bike
1993? VTR 250 Honda gone
1983 LTD 440 Yammy gone
1988 CBR 600 Honda gladly gone!!
1976 KZ900 daily driver
Please Log in or Create an account to join the conversation.
- kano
- Offline
- User
- Not Another Bloody Limey!
check carbs and filters for debris then
i'd buy some more jets im going to order some of each size and a colour tune like OMR
should be easy to dial it in,
this is what i intend to do.
Please Log in or Create an account to join the conversation.
- timebomb33
- Offline
- User
- Posts: 4288
- Thank you received: 10
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
Please Log in or Create an account to join the conversation.
- toadson
- Topic Author
- Offline
- User
- Posts: 204
- Thank you received: 1
79 KZ1000 LTD. Mikuni VM26 w/ accelerator pump. 4 into 1 header. Stock intake setup. GS1100 Swingarm, My swap thread: kzrider.com/index.php?option=com_kunena&...d=5&id=210872#210872
Please Log in or Create an account to join the conversation.
- toadson
- Topic Author
- Offline
- User
- Posts: 204
- Thank you received: 1
79 KZ1000 LTD. Mikuni VM26 w/ accelerator pump. 4 into 1 header. Stock intake setup. GS1100 Swingarm, My swap thread: kzrider.com/index.php?option=com_kunena&...d=5&id=210872#210872
Please Log in or Create an account to join the conversation.
- Patton
- Offline
- KZr Legend
- Posts: 18640
- Thank you received: 2098
I got my first test run in today. My #1 cylinder kept backfiring through the carb the entire time I was cruising, but after riding it I checked the air screw. I only had it out 1 full turn, while the others were 1 1/2 turns out. I adjusted it to 1 1/2 turns, so I'll have to see if that fixes the backfiring. If not, something may have found its way into a jet while I had the bowls off. I think it will run a lot better if I can get that one cylinder straightened out. Even idling, you could tell it wasn't hitting on one cylinder, and the idle would fluctuate.
If not already done, would check/adjust valve clearances (especially #1 intake), and assure correct ignition timing and proper operation of advancer with strobe-type timing light by watching it move back and forth as rpm is varied by blipping the throttle.
Am doubtful that the above mentioned pilot air screw adjustment will resolve the backfiring, because turning the screw out leans the pilot mixture by allowing more air into the mix. But do concur with having them equally set initially prior to further fine tuning of the idle rpm.
Good Luck!
1973 Z1
KZ900 LTD
Please Log in or Create an account to join the conversation.
- toadson
- Topic Author
- Offline
- User
- Posts: 204
- Thank you received: 1
I never had problems with the carbs backfiring until I installed the #20 pilots. It doesn't really make any sense since I am giving the carbs more gas. I might have to take them off again and make sure there is no junk caught in the needle seat or anywhere else.
If all else fails, I may check the valve clearances. This bike has over 30k miles so I'm sure its due for that.
79 KZ1000 LTD. Mikuni VM26 w/ accelerator pump. 4 into 1 header. Stock intake setup. GS1100 Swingarm, My swap thread: kzrider.com/index.php?option=com_kunena&...d=5&id=210872#210872
Please Log in or Create an account to join the conversation.