2002 cb 919 wont start? - Wrist Twisters
 1Likes
  • 1 Post By abu272
 
Thread Tools Display Modes
post #1 of 29 Old 05-08-2016, 05:54 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
2002 cb 919 wont start?

Hi guys
I just bought a 2002 cb 919 off this guy that one of my buddies knew, he wrecked the front by wheeling the bike before he said it ran before but for someone reason he disassembled everything on the bike, so i bought it and put everything together following pictures and the manual, so i thought i did everything, but here's my problem, i turn on the bike the pump primes everything turns on, i put it in neutral, tried pulling in the clutch and not pulling on the clutch, kickstand up, but all the bike does is just crank, i checked spark and i have spark and i filled the gas tank up so i have gas then when i'm cranking it 1st sounds like its literally doing nothing and 2nd it sometimes backfires everyone's in a while but i double checked everything, hopefully one of you guys can help me, thanks in advance.

abu272 is offline  
Sponsored Links
Advertisement
 
post #2 of 29 Old 05-08-2016, 07:32 PM
The Cripple
 
Pvster's Avatar
 
Join Date: Nov 2009
Location: Phoenix
Posts: 8,765
Rep Power: 1
 
Be sure coil 1 and coil 2 are set up correctly.

Pvster is offline  
post #3 of 29 Old 05-08-2016, 07:41 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
this is going to be a dumb questions but i don't know how they are set up i just guessed, if you can help me i would really appreciate, thanks

abu272 is offline  
 
post #4 of 29 Old 05-08-2016, 09:46 PM
The Cripple
 
Pvster's Avatar
 
Join Date: Nov 2009
Location: Phoenix
Posts: 8,765
Rep Power: 1
 
coil 1 runs 2/3, coil 2 runs 1/4.

Check out the 919 diagram: https://www.wristtwisters.com/forums/...ml#post1151722

Pvster is offline  
post #5 of 29 Old 05-09-2016, 05:47 AM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
Thank you Pvster, ill check that out today.

abu272 is offline  
post #6 of 29 Old 05-09-2016, 09:48 AM
Old, Bold rider
 
robtharalson's Avatar
 
Join Date: Jan 2007
Location: Aurora, Colorado
Posts: 2,354
Rep Power: 1
 
Garage

Awards Showcase
Donation Veteran Community Leadership 
Total Awards: 3

Once you are sure the coils are right it can be started by holding the throttle wide open while cranking. Called dechoke, the ECU sees the throttle position and cuts fuel until the engine starts. As soon as it starts do not let it idle -- take it on a good long ride to clear the cylinders of excess fuel. Works like a charm.

Rob

If it has already been done, it is safe to assume it is possible to do it.
On the other hand, if it has not been done never assume it is impossible to do it.
------- Rob --------
robtharalson is offline  
post #7 of 29 Old 05-09-2016, 10:29 AM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
Thank you Rob for the tip, I'll do that for sure when i get home, thanks again

abu272 is offline  
post #8 of 29 Old 05-09-2016, 02:02 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
I just changed the coils and put them in the right place, but now it cranks cranks sometimes backfires and when i hold the throttle wide open it backfires a lot. and i waited 10 minutes to make sure its isnt flooded but same thing.

abu272 is offline  
post #9 of 29 Old 05-09-2016, 02:20 PM
The Cripple
 
Pvster's Avatar
 
Join Date: Nov 2009
Location: Phoenix
Posts: 8,765
Rep Power: 1
 
I know it sounds simple, but check your battery. You may have enough voltage to crank, but not enough to fire up.

Be sure your coils are connected correctly and that the leads to the coils are not reversed. Check the fsm for trouble shooting tips under the section where engine cranks but does not start.

Pvster is offline  
post #10 of 29 Old 05-09-2016, 03:45 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
I just bought a battery off amazon so I'm currently using a jump box. Could that affect anything
And I am sure my coils are in the right place but I have a feeling that there not lol do you mind if you have time to take a pictures of yours so just to double check mine isn't wrong. Thanks.

abu272 is offline  
post #11 of 29 Old 05-09-2016, 03:57 PM
The Cripple
 
Pvster's Avatar
 
Join Date: Nov 2009
Location: Phoenix
Posts: 8,765
Rep Power: 1
 
Yeah a jump box won't do anything to keep the engine running once fired. That might be the "backfires" you're explaining. The bike won't produce its own current draw below 2,400 rpms and runs off the battery until the engine revs.

As for the coils, just check the diagrams and make sure the leads are correct and that everything is making good contact and is tight. Lacking a battery is your primary issue I suspect.

Pvster is offline  
post #12 of 29 Old 05-09-2016, 04:12 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
Now when I think about it that was dumb on my part now I'll just double check my coils and wait for my battery to come in. I really appreciate it, I wouldn't have come this far with out you. Thank you again I'll give you a update when my battery comes in the mail thanks
Jonstrocity likes this.

abu272 is offline  
post #13 of 29 Old 05-09-2016, 06:13 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
another thing is that i can feel the headers get hot and some smoke comes out of the exhaust. Do you think it can be timing but when i get the battery in, ill give you update thanks

abu272 is offline  
post #14 of 29 Old 05-10-2016, 12:57 AM
Imaginifer
 
woodyeee's Avatar
 
Join Date: Mar 2007
Location: united kingdom
Posts: 406
Rep Power: 1
 
Start with new plugs as plugs don't like being flooded with fuel. Then try it and if it doesn't start swap over the plug leads. Is the fuel good? Are the wires to the coil correct?

http://i121.photobucket.com/albums/o222/woodyeee/IMAG0306.jpg
woodyeee is offline  
post #15 of 29 Old 05-10-2016, 05:47 AM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
Yah the coils are correct because i'm getting a lot more backfire so i thinks that they're trying to start but i don't think it with and also i looked at the plugs, they look really worn down like the gaps are huge so i think i'm going to buy new plugs. And i emptied out the gas tank because the gas smelled werid so i put new gas in. Thank for advice

abu272 is offline  
post #16 of 29 Old 05-11-2016, 04:55 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
Update i got new plugs gap property and a new battery with good voltage but when i try to start it nothing, it literally sounds like nothing is happening and i tried bumpstarting it. The bike made a weird sound, 1st it was easy to push but i know that u have good compression by using a gauge and when i was pushing it it was making a "qlack qlack qlack" sound over and over everytime i tried.

abu272 is offline  
post #17 of 29 Old 05-11-2016, 09:17 PM
Batman
 
velodesign's Avatar
 
Join Date: Feb 2010
Location: Fargo
Posts: 1,053
Blog Entries: 3
Rep Power: 1
 
Quote:
Originally Posted by abu272 View Post
Update i got new plugs gap property and a new battery with good voltage but when i try to start it nothing, it literally sounds like nothing is happening and i tried bumpstarting it. The bike made a weird sound, 1st it was easy to push but i know that u have good compression by using a gauge and when i was pushing it it was making a "qlack qlack qlack" sound over and over everytime i tried.
You have a disconnected ground from under the tank is my suspicion. Check that ground wire and teport back

I may not have a lot to say but it doesn't mean I don't listen.
velodesign is offline  
post #18 of 29 Old 05-12-2016, 06:52 AM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
I just checked the ground it was lose so I tighten it up nicely but still same results

abu272 is offline  
post #19 of 29 Old 05-12-2016, 08:24 AM
The Cripple
 
Pvster's Avatar
 
Join Date: Nov 2009
Location: Phoenix
Posts: 8,765
Rep Power: 1
 
Go back to the basics. Is the engine turning over? If no, start there. Kill switch working? Does it turn over with the bike in neutral, kickstand down? Kickstand up? In gear with kickstand up and clutch pulled?

If yes, are you getting fuel? is the fuel pump priming when the key is turned to on? Is the headlight working (if the headlight circuit isn't working and/or you don't have a fuse for the headlight, it won't let you start the bike)? Is the fuel rail building pressure? Do the injectors cycle? If no, troubleshoot the fuel system.

If yes, are you getting spark to all 4 cylinders? Are the coils working, property connected? Is the battery properly wired? Grounded? Do you have a short somewhere? Is the ecu getting full power with key on? with engine cranking? Does the battery have good voltage when cranking? Etc.

Hope this helps.

Pvster is offline  
post #20 of 29 Old 05-12-2016, 06:52 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
I just got done working on the bike, i literally checked over everything that can be the issue, i asked a guy on my street that is mechanic smart, he said that he things that it could be really low compression because we covered the spark plug hole and felt no suction and he said my valves shim could need to be replaced or the timing can be off, do you guys think he rights, thanks btw

abu272 is offline  
post #21 of 29 Old 05-12-2016, 06:55 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
I'm thinking off maybe just taking it to a shop but i don't want to pay a fortune, you guys are my last choice

abu272 is offline  
post #22 of 29 Old 05-12-2016, 07:23 PM
The Cripple
 
Pvster's Avatar
 
Join Date: Nov 2009
Location: Phoenix
Posts: 8,765
Rep Power: 1
 
Quote:
Originally Posted by abu272 View Post
I just got done working on the bike, i literally checked over everything that can be the issue, i asked a guy on my street that is mechanic smart, he said that he things that it could be really low compression because we covered the spark plug hole and felt no suction and he said my valves shim could need to be replaced or the timing can be off, do you guys think he rights, thanks btw
If that's the case, time to do a leak down test and/or compression test before you do anything else.

Pvster is offline  
post #23 of 29 Old 05-12-2016, 07:35 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
Im going to borrow one tomorrow, whats a good PSI that each cylinder should hold thanks

abu272 is offline  
post #24 of 29 Old 05-12-2016, 07:47 PM
RIDE RED
 
SPYDER's Avatar
 
Join Date: Jul 2011
Location: Boone
Posts: 1,882
Rep Power: 1
 
Remove your valve cover and check timing the following video is what mine did found to be one tooth off
https://youtu.be/nRB8DyFL8Tc

SPYDER is offline  
post #25 of 29 Old 05-12-2016, 08:05 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
thats funny when i crank my bike, it doesn't sounds like that at all, it just sounds like the starter is the only thing spinning and not turning over the motor, tomorrow ill take a video of me trying to my bike and i want you guys to hear it and maybe tell me whats wrong.

abu272 is offline  
post #26 of 29 Old 05-12-2016, 08:07 PM
RIDE RED
 
SPYDER's Avatar
 
Join Date: Jul 2011
Location: Boone
Posts: 1,882
Rep Power: 1
 
This was after a broken intake spring which resulted in a bent valve. Hopefully if your timing is off its not off bad enough to interfere (Pistons hit valves) good luck hope you get it sorted and get her on the road very fun bike

SPYDER is offline  
post #27 of 29 Old 05-12-2016, 08:11 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
Thank you im gonna need the luck, does it say how to setup your timing in the manual.

abu272 is offline  
post #28 of 29 Old 05-12-2016, 08:16 PM Thread Starter
Tirone
 
Join Date: May 2016
Posts: 17
Rep Power: 1
 
Do you know why that can be that when i try to start my bike, i don't hear what you hear when you're starting your bike?

abu272 is offline  
post #29 of 29 Old 05-13-2016, 01:18 PM
RIDE RED
 
SPYDER's Avatar
 
Join Date: Jul 2011
Location: Boone
Posts: 1,882
Rep Power: 1
 
Yes the manual covers it page 8-24 8-25

SPYDER is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Wrist Twisters forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome