Just tell me my new '04 450 doesn't need carb work.......
Posted March 04, 2004 - 04:53 AM
When cold I've tried a few methods attempting to find out what the best method is.
1. No choke, no shot of gas. Bike will whirl until the battery starts dying out.
2. Choke it, no shot of gas. Kinda hit and miss here. Has worked on occassion, and at times get the same result as above.
3. Choke it, one quick shot of gas. Seems to be the best method, but it still whirls entirely to long. Has intermittent puffs and pops out the exhaust.
4. No choke, couple quick shots of fuel. About the same as throwing the dice at Harrah's, you never know what you're gonna get. Will it be 7,11, or the dreaded snake-eyes.
Once again, this is when the bike is cold. When the thing has been ran any at all it seems as if it will consistently crank about the same. Even then though I feel as if the starter is working overtime.
My carb is stock other than the modified throttle stop. I haven't turned the first screw on the thing, and really don't want to have to go real deep into the thing unless it is absolutely necessary. I will be happy with just an improvement at this point because I really want to ride the thing instead of wrench on it. I've only had the thing for two weeks, it ain't even dirty!!!
Posted March 04, 2004 - 05:06 AM
twist throttle fully 3-4 times before starting.
then start it.
whatever you do dont twist throttle while starting.
works well every time.
Posted March 04, 2004 - 05:20 AM
My jetting is pretty good too. Not lean.
Posted March 04, 2004 - 05:44 AM
Posted March 04, 2004 - 06:02 AM
Posted March 04, 2004 - 06:19 AM
Posted March 04, 2004 - 06:37 AM
It sounds like you've got your bike starting up pretty good. I told the guys at the dealership how that I loved the bike, but was astonished at how hard the thing is to start when cold. I can't believe Yamaha doesn't remedy this. Their thumpers are notorious as being a pain to start. When I told some friends that I was thinking about getting either the YZ-F or WR they were like "Dude, I hope you enjoy kick-starting because you have a lot of it in your future"!!! That was one of the reasons I got the WR. I figured I'd let the pushbutton do the work. But geesh,.....I feel sorry for that little battery & starter. In all honesty each time I start the bike when it's cold I almost run the battery down. So sad.....
Now on to the starter jet. A pain to install? Carb have to be removed??? I actually think my bike came with some extra jets? It is a small plastic package with what appears to be jets. That, a manual, and a plug wrench is all that came with the bike.
Posted March 04, 2004 - 06:39 AM
I use a 72 all summer (Minnesota-up to 90 degrees F) long with no issues. The wrench at the local Yamaha shop told me that my bike was the best starting YZ/WR he had ever seen.
I was ice riding this winter and I thought about increasing the sj but never got to it.
Ride fast-take chances.
Posted March 04, 2004 - 07:50 AM
As with anything you need to get it set up correctly. I haven't used the kick starter since last fall when I put the 70 sj in. I ride a couple of times a month, and never use my battery tender. The extra jets you have are main jets and pilot jets, you'll need to order the starter jet. Do a search and you can find the part number. You don't need to take the carb completely off, but you will have to loosen both boots are rotate it to remove the bowl from the bottom. I wanted to be extra careful not to loose any parts so I took the carb off to change the SJ. That also gave me a chance to check the float level (although it was fine). Look in your manual at the carb diagram. It will show all of the jets. If I remember correctly, you have to remove a little plastic shroud to get access to the SJ. I also would recommend the JD kit, you'll find nothing but good comments on it.
Posted March 04, 2004 - 08:08 AM
Posted March 04, 2004 - 11:11 AM
Posted March 04, 2004 - 11:26 AM
Posted March 04, 2004 - 03:02 PM
Posted March 05, 2004 - 02:40 AM
here's the 72 sj number. 3tj-1494f-16. it will help. there is a small box in the "starting and break-in" section of you manual. it says to open the throttle three or four times before starting when it is below 41F. i was told by someone on-line that this was not in the '04 manual but i'm helping a freind set up an '04 and it is still there. it's in "gen info". i'm sure you have the same jetting as my buddie. you will have a 45 pilot and a 165 main. if you pull the insert out of the air box and switch the exhaust insert you may want a 48 pilot. the 165 main will probably be okay. love those jd needles. look, you can probably leave your bike stone stock and love it. figure out some of the quirks and have a blast. BUT this bike can go to another level with just a little tlc.
Well I for one cannot argue with that,....well said my man.
Rich, I oughta..........don't make me.........
That's funny dude!!!!!
Posted March 05, 2004 - 07:43 AM
Posted March 05, 2004 - 08:42 AM
I feel I have the answer to cold starting. It works on cr250 2 stroke, wr426, wr450, and drz.I'm in michigan, and I'm talking 20 to 35 degree weather starts. 1 Gas on (this helps a lot (HAHA) 2 Lean bike to left to fill carb bowl. 3 ignition on (WR450/DRZE) 4 Choke on, Blip the throttle 3 to 5 times and return throttle to full closed. Kick start only, for all but the DRZE which has a good battery and starter. Use a good firm kick. Kick 3 to 5 times if it doesn't start blip 3-4 times and kick up to 5 times. repeat until it starts.It will start. When it's cold the starter on a wr450 just won't turn enough RPM's to get it fired. Kicking it turns it over at higher RPM's. I expect to get flack on this, but give it a try.
That's good advice.
I started my DRZ last night using a nearly identical
procedure (I don't lean my bike to fill the bowl) and it
fired right up.
Wrong forum (DUH) but is the Yamaha "Starter Jet" the same
one that Suzuki calls the "PAJ"? Seeing how the carbs are
nearly identical, is that the one just inside the intake of
Posted March 05, 2004 - 08:57 AM
it's located next to the main jet. not sure about the suzuki but if it uses the fcr carb it probably has one. it's in the float bowl along with the main jet and pilot jet.
Posted March 05, 2004 - 09:19 AM