Misfiring and puffing sound

[Dumbquestionguy]

Hello again I've been loving this bike more than life and last time I rode it I was having some issues. The bike has Murray carbs so I know it won't run the best but it does good I had it professionally tuned. It's been popping and every once and a while and when I was at a red light I pulled cylinder one plug off and it didn't change idle or anything. I also can hear a puffing noise from the left side of the motor. I was wondering if I should check valves clean carbs or change ignition and plugs. Thank you in advance

 

[brettp]

Depending on what that puff sounds like, it could be a carb boot that isn't on all the way (or is torn), or it could be an exhaust leak at the header.

 

[Dumbquestionguy]

Depending on what that puff sounds like, it could be a carb boot that isn't on all the way (or is torn), or it could be an exhaust leak at the header.

Ill check the header I can't remember if I did full ring change on the pipes or just half

 

[Dumbquestionguy]

It was a torn carb boot

 

[brettp]

Finding it is 90%. Congrats

 

[Loose Chain]

It was a torn carb boot

Good call Brett. What is holding up the weight of that carb setup? Is everything hanging off the intake boots? If it is you are going to be changing those intake boots fairly regularly. What is the blue plug with the zip tie all about?

 

[Dumbquestionguy]

Good call Brett. What is holding up the weight of that carb setup? Is everything hanging off the intake boots? If it is you are going to be changing those intake boots fairly regularly. What is the blue plug with the zip tie all about?

I gotta build something for the carbs make it stronger and Its just blocked off because I got some junk petcock on my tank

 

[brettp]

You don't have an airbox helping to hold the carbs up?

 

[Loose Chain]

Ya you are going to need some kind of bracket to hold the carbs up. You could make a bracket that goes up to the bolt that held the airbox in place. Don't leave it like that. What does the petcock have to do with the blue plug?

 

[Dumbquestionguy]

Ya you are going to need some kind of bracket to hold the carbs up. You could make a bracket that goes up to the bolt that held the airbox in place. Don't leave it like that. What does the petcock have to do with the blue plug?

Is the hole for the vacuum that was apart of the old carb system

 

[Dumbquestionguy]

You don't have an airbox helping to hold the carbs up?

No Murray carbs didn't come with anything

 

[Loose Chain]

You really should fix that before you go and further. What do you have for filters?

 

[Dumbquestionguy]

You really should fix that before you go and further. What do you have for filters?

Fix the blue plug or making a carb bracket?

 

[brettp]

Carb bracket. The Murray's carbs I've seen have metal intake manifolds that can hold a carb up. You have rubber boots. Then again, I'm not too familiar with them. The weight of those two carbs will continue the stress the rubber no matter how many times you replace them.

 

[Dumbquestionguy]

Carb bracket. The Murray's carbs I've seen have metal intake manifolds that can hold a carb up. You have rubber boots. Then again, I'm not too familiar with them. The weight of those two carbs will continue the stress the rubber no matter how many times you replace t

I'm gonna build a bracket for it make it sturdy do you know where I can get new boots? 4 into 1 won't accept my payment for some reason

 

[brettp]

David silver spares, cb750 supply are a couple.

 

[Loose Chain]

Fix the blue plug or making a carb bracket?

Yes as Brett says, carb bracket. Should be an easy piece to make. The blue plug with the zip tie holding it is going to fail too so you might as well deal with it too. You will notice the other cylinders have short screws with a small washer where you have the blue plug. Just pull one of the screws out so you can see what it is you need to buy.

 

[Dumbquestionguy]

Yes as Brett says, carb bracket. Should be an easy piece to make. The blue plug with the zip tie holding it is going to fail too so you might as well deal with it too. You will notice the other cylinders have short screws with a small washer where you have the blue plug. Just pull one of the screws out so you can see what it is you need to buy.

Ok so it's just a simple plugging it with another solid screw I was worried it was something big

 

[Loose Chain]

It should be just the same as the other 3 cylinders.

 

[brettp]

I believe they are M6 x 8mm. Don't quote me, just giving you a reference