I have cobra classic deluxe exhaust , stock filter , i have jets in carb as follows , 165 front main , 170 back main , 42 idle both , the bike makes backfire while decreasing and also back cylinder feels like the one having the problem , when i kick the accelerator it makes fires and hesitates the engine , i don't know what can i do ? i was thinking of getting the stock jets 180 back main and 175 front main , idle stays 42 ,, any suggestions ?
SOURCE: Honda Valkyrie Interstate 1999: 25000 miles Cobra
Stock size for the slow jet is 35. Some guys put in 38's to make them less prone to getting plugged. I would say that you still have gunk in the slow jets. Also turn the pilot screws out 2 1/4turns. If the exhaust pops and you have no exhaust or vacuum leaks turn the pilot screws in 1/4 turn at a time till it goes away.
Did you change the plugs and the air filter? How about checking and or replacing the vacuum lines?
You might try a full bottle of Techron fuel system cleaner in a tank of gas. It may clear the problem up.
I had to clean the jets on my 1999 I/S twice and it's not a fun job.
Hope this helps.
Bob
SOURCE: 2006 honda shadow sabre backfires
valves need to be adjusted every 6000 miles your way past due also your carbs need to be in sync together a shop has to do this work
SOURCE: 2002 HONDA SHADOW ACE 750 CARB
It sounds like you may have or will be jetting your carbs. I did this using the directions with the kit and used the Clyman manual for this bike to show me step by step how to remove the carborator. You will only need to attach 2 of the 4 hoses on your carb. syncronizer. If I remember right, you need to remove the bolt-on cooling fins to expose the engine block. The is a black screw or bolt that you take out and screw the threaded metal adapter of the sync tool. Be careful using the sync tool. Be very light on the throttle or the vacuum in the cylinder will **** in the mercury from the sync tool - not good. The problem you are stating on idle & backing off sometimes happens when the carbs are running rich (too much fuel) Hope that gets you in the right direction.
SOURCE: Hesitates and backfires through the exaust when accelerating
Sounds as if your timing is not quite right. You need a manual, but The best I can offer is a 98: http://www.carlsalter.com/motorcycle-manuals.asp , it may help, but if you only have 1100 miles on it, I would be taking it to a qualified mechanic to be fixed. Up to you.
SOURCE: I have a 2000 Honda
When you installed the Vance and Hines pipes did you use new gaskets? Popping and backfiring is often caused by leaking copper o-rings in the head to head pipe connection , or head pipe to muffler gasket. Sealing the system will prevent oxygen igniting the unburned fuel in the exhaust pipe. Hopefully , this is all you need to stop the popping.
Testimonial: "The pipes were done before I got it but I will certainly check out the gaskets. I appreciate your time. thanks"
1,606 views
Usually answered in minutes!
×