[gsxr600srad]

well i bought the bike as a basket case and been riding the thing last year and this summer so far. I deleted the hotstart cable and installed a choke plunger in the hole instead. Bumped the the pilot to a 45 and main 2 sizes up i believe. Got a quick adjust fuel screw at 2 turns roughly. needle position i have no idea. When it gets warm , bike runs good and can start it with a kick or two after i shut it off when hot. Intial starting takes a few extra kicks and few twists of the throttle to get going. Just curious if anyone else has done this to their carb and what there jetting may be. Just bought a newer electric start , FI bike and wanna leave that as a snowbike setup and keep this thing for the summer. Thanks

[JimDirt]

What is your current elevation and jetting ??

Have you checked the valves to see if they may be closing up ???

Generally for cold starting (depends on the bike and jetting , as there are always variables) is you twist the throttle 5-6 times to load the fuel in the venturi ...slowly kick the bike over till you feel the compression at its highest , then release the kick stat and give it a full hard kick (usually with the choke on) , the bike should or almost start , if it does not start repeat the process and it should start right up .... I have found this to be the best cold procedure is to prime the carb so to speak with at least 5 but no more than 8 full twists , then get it on compression , and a manly kick ... this has worked for me for years as being the most reliable way to start these bikes when cold/first starting for the day ... usually afterwards just start them ...

Jetting Chart below , is where you should be

Jetting Guide for Main Jet:(pilot 45) CRF450R/X ... Fuel Screw should be no more than 3 turns out and no less than 1 in , otherwise go to next larger/smaller pilot jet ... Needle position is usually best around 3rd to 4th from top depending , for fine tuning of jetting , bogging , etc.

Sea level....165
2000 ft.......162
4000 ft.......160
6000 ft.......158
8000 ft.......155


Temperature/Elevation:
One main jet size (up/down) for every 2,000 feet or 25 degrees in temp.

[Leardriver]

A bike that starts great warm and takes a couple of extra kicks when cold sounds perfect.

What is the actual size of the main jet?

[gsxr600srad]

Havent got in to carb since i jetted it last year. Its my first 450 bike since getting rid of my 2 strokes. im in michigan so elevation is nothing crazy. less then 1000ft normally. Im gonna tear it apart in the next day or so. I live a mile for the trails and never wanna have it down for too long. lol Valves are good, even though im gonna re check them here shortly .Just bought a shim kit for them. Il try the extra few throttle twists during intial starting. i usually do 2 then roll it over and it will fire quickly and shut off. I know its not a major issue with the bike because for an old bastard it runs like a beast especially with my big rear on it .

[JimDirt]

Yea ... Like Leardriver said , you are probably pretty close on jetting by the sounds of it .... but the starting procedure does help ... my 06 X will not start cold unless you wack the throttle about 6 times and pull the choke .... , after that it is great ...