Carburetor / Valve Problem?

[kingkang204]

Hey Guys.

Original Problem: Puffing sound coming from the engine/Lack of Problem

Story: So as stated in a previous thread I made about a broken carb and the problems that could be associated with it. So I ordered a new Carb from Ztrack and got it last week but wasn't able to put it in my bike. Yesterday my brother and I found time and put it in, all the cables and hoses matched up. I wasn't able to test ride it last night because it was too dark but just now I went for a ride. The same problems are still there, there is a little bit more power but it seems as if the puffing sound has been amplified.

Possible Causes: The bike has 10300 miles on it and hasn't had a valve adjustment yet, could this be it? The puffing sound comes from the front end of the bike could it be an exhaust leak?

Plan for now: I plan on synching the carbs because that hasn't been done since the 500 mile service. I will try and find time to do the valve adjustment, I have service manual and plan on using the videos Ninja250r made (Thanks Man!).

Link to original page on YouTube.

The sound I hear when riding is around 0:20-0:30 in the video but its much louder when the bike is under load?


Does Anyone Have Any Thoughts Of What It Might Be?



*Alex feel free to merge this with my "Broken Carb" thread, I made a new one because the carb isn't really broken anymore*

[Boom King]

Your video is marked as "private".

[kingkang204]

Originally Posted by Boom King

Your video is marked as "private".

Sorry about that, I fixed it.

Thanks for the heads up

[reaperw]

Looks like one of the headers is mising a bolt on the left side
Posted via Mobile Device

[Socal5646]

Lol....good eye!

[kingkang204]

I didn't see that! So exhaust leak is a possibility? Do you think I could just take a screw out and take it to a local screw shop to get a similar one, or should I get the exact screw!

[Skippii]

Originally Posted by kingkang204

I didn't see that! So exhaust leak is a possibility? Do you think I could just take a screw out and take it to a local screw shop to get a similar one, or should I get the exact screw!

I can't see the video, but I gather I have the exact same problem as you, missing a header bolt. I replaced all of the studs on my engine with stronger bolts from Home Depot, except for one, which is still broken off in the engine, and looks like it will remain that way until I have a chance to remove the engine from the bike and tear it apart.
Mine's a pregen, though. Don't know if yours uses studs or bolts.

[kingkang204]

Originally Posted by Skippii

I can't see the video, but I gather I have the exact same problem as you, missing a header bolt. I replaced all of the studs on my engine with stronger bolts from Home Depot, except for one, which is still broken off in the engine, and looks like it will remain that way until I have a chance to remove the engine from the bike and tear it apart.
Mine's a pregen, though. Don't know if yours uses studs or bolts.

Mine Makes like a "Puffing" sound when the engine is under load. I didnt know that one of my headers was missing a bolt but an exhaust leak was one of the things I had in mind.

I'll try and replace that tomorrow and give an update.

Thank's for the ideas guys!

[dubojr1]

Believe it or not those nuts are hard to find. I had this same problem and only after searching a dozen hardware store and part supplier... O'reilly's was the only place that had them in grade #8. They are metric nuts which no one seemed to keep on hand.

[kingkang204]

Originally Posted by dubojr1

Believe it or not those nuts are hard to find. I had this same problem and only after searching a dozen hardware store and part supplier... O'reilly's was the only place that had them in grade #8. They are metric nuts which no one seemed to keep on hand.

Theres a place where I live called "Tacoma Screw" and they have tons of fasteners and screws an washers and such do you think that they would carry these?

I plan on just taking another one out and seeing if they can match it.

[Skippii]

I can't believe the trouble some people seem to have finding nuts and bolts on this forum. Ace Hardward, True Value hardware, Lowes and Home Depot always seem to have what I need.

I'm sure any fastening store will have what you need.

[Boom King]

Depending on the screw or nut, finding metric hardware can sometimes be harder at your typical big home hardware store like Lowe's or Home Depot especially if there is no imperial equivalent. Ask me how I know after I was working on the Ninjette. A store specializing in screws like "Tacoma Screw" would be your best bet. If my mechanic is working on an import car and he needs a screw or bolt, he doesn't go to Home Depot.

[kingkang204]

So as I am writing this I have the biggest smile on my face, and its been a long time since I've smiled about the ninja.

The problems:
Missing 1 bolt on EACH HEADER
Ripped Diaphragm

The fastener place had the bolts, they're a little bigger on the outside but the inner diameter is the same. My guess is that the bolts rusted and slowly unscrewed themselves due to the vibrations. With the 2 shims under each needle and the snorkle removed its fantastic. When I was reading about the people who said it was like a new bike when they did that I thought they were over exaggerating, but its true.

What Improved:
Power (Torque, maybe horsepower I try not to speed so I may never know)
Throttle Response
Sound, it has a deep growl/wallow at small opening


Thank you all for the help! I would of never noticed that I was missing bolts on my headers.

[reaperw]

That will be $5 for the help right guys


As soon as i notcie your bolt missing i went outside to make sure my was still there as well

[Skippii]

torque isn't power, it's force. Horsepower is power, as are watts. You can't say the bike has more power but not more horsepower...that's like saying the temperature is hotter, but not in degrees.
Posted via Mobile Device

[Ninjettepgh]

Originally Posted by kingkang204

The problems:
Missing 1 bolt on EACH HEADER
Ripped Diaphragm

The fastener place had the bolts, they're a little bigger on the outside but the inner diameter is the same. My guess is that the bolts rusted and slowly unscrewed themselves due to the vibrations. With the 2 shims under each needle and the snorkle removed its fantastic. When I was reading about the people who said it was like a new bike when they did that I thought they were over exaggerating, but its true.

Wow! I've been searching high and low about what this could be and alas, i have missing bolts on my 06 ninja

Now...forgive me for being a newb...but what are you all talking about "shims under each needle and the snorkle removed"?

[red5]

This is a good place to start but there are lots of other threads on this topic.

Shimming the Carb Needles

[Ninjettepgh]

wow thanks for such a quick reply. I think i will definitely try it but...have two more stupid questions

1) still dont undestand what snorkel is?
2) does it really take 4ish hours to get into the carb and put another washer on?

thanks

[red5]

Originally Posted by PGHninjette

wow thanks for such a quick reply. I think i will definitely try it but...have two more stupid questions

1) still dont undestand what snorkel is?
2) does it really take 4ish hours to get into the carb and put another washer on?

thanks

1. On the back side of the air box. Part 14073A in this photo...



2. More like an hour and a half or so. You can get to the needles without removing the carbs.

[Ninjettepgh]

Thanks... im in the middle of trying to get to my carb and i can't access the back two screws of each one because of the frame...tell me there's an easy way around this...