2005 Roadstar Silverado Engine starts immediately with choke fully engaged. Runs rough if I push the choke in after a minute or so as specified in the owners manual. . Run with choke out for about five miles before engine response is normal. Bike bogs out at slow speeds. Have to keep revving the engine to get enough rpms to go from a standing position. Once the bike warms up it runs great. At high speed acceleration is great and runs fantastic at highway speeds. Bogging out and runnign with choke engaged bothers me. What could it be???

Newriver

newriver wrote:
2005 Roadstar Silverado Engine starts immediately with choke fully engaged. Runs rough if I push the choke in after a minute or so as specified in the owners manual. . Run with choke out for about five miles before engine response is normal. Bike bogs out at slow speeds. Have to keep revving the engine to get enough rpms to go from a standing position. Once the bike warms up it runs great. At high speed acceleration is great and runs fantastic at highway speeds. Bogging out and runnign with choke engaged bothers me. What could it be???

Newriver

How many miles on your bike?
What is the maintenance history?
Bad gas?

How high is your idle set? Might also want to pour in some Seafoam and run through a tank.

about 4000 miles. no maintenace records just bought the bike two weeks ago. Changed oil and filter. went on 1000 mile trip last weekend lokking to change the plugs and air filter this week. Just getign used to the bike had a Suzuki for 10 years before the roadstar.

are you running with after market air kit and after market pipes? if so, what is the jetting, including how many turns out on pilot screw. what are the temps? First start of the day, choke is required. keep in mind, you have to bring the engine oil up to operating temps, just because the engine feels hot, is the oil temps hot? Both idle adjustment and pilot screw final adjustment need to be done on a fully warmed engine. in 60 deg temps, 5 miles is not out of the norm, I would not leave the choke on for that long tho, better to feather the throttle, choke on for too long will foul the plugs. bogging and stumbling are usually an indication of too much gas, hesitation too little gas. If it runs well after fully warmed, could be idle is set too low, or pilot screw needs a slight tweak (maybe 1/8 turn)

like Erb was asking any mods?
What year bike?

only 4,000 miles shouldn't need plugs but I used to drive a lot of miles and only replaced the plugs on my 16,000 mile or so checks with other changes.

If the jetting has been changed need to know whats in it..
If stock probably just needs some seafoam or any of the other gas treatments of choice to clean up any varnish or bad gas in the carb and tank.. I used to used Marvles mystery oil as a gas stabilizer and to be a fuel saver when they started putting winter gas at the pumps that had all the alcohol.

I had the same problem with my 07 last fall.I fogged it several times with the seafoam spray and let it sit overnite. Opened the PMS about a 1/4-1/2 turn (replaced it with one from maxair). I also ran a couple of tanks with seafoam.I also stopped using premium.Added iridium plugs. Has this just started since you changed the oil?
http://www.youtube.com/watch?v=zh5q7uiWI80.

bill

@005 silverado the bike has vance and hines longshots with no baffles. I do not know what the main jet size is but I think that it is stock. Went and got air filter and plugs this afternoon. Figured it wouldn't hurt to do a minor tune up since the weather here in Cleveland is so crappy and will be for the next week or so. Good time to work on the bike, can't ride.

Main jet is not going to affect idle and low speed, but at 4k miles, sounds like it's been sitting more than riding. I do 4k in 2 , 2.5 months. pilot ckt might have some varnish build-up from sitting gas, but thats just a guess, no baffle is also going to affect the low end as well, and probably would need a titch richer piot ckt to compensate for the no back pressure.