trouble starting brand new bike


17 replies to this topic
  • badburn

Posted April 12, 2009 - 02:09 PM

#1

I just bought brand new 09 yzf 450. I roughly have 15 running hours on it . Im having a hell of a time starting the bike. Once i get it to run it has no problem for the rest of the day. I took it back to yamaha they showed me that im kicking it to hard , like how u kick a 2 stroke. One hard quick kick.A smooth soft kickm does start it more easily but imstill having to kick it 30 -50 kicks. Does anybody know whats going on? Do i need to check my valves? Shoulnt a brand new bike fire right away?Any other 09 yzf450 Having the same problem?
Please all advice would be appreciated

  • mxdude1986

Posted April 12, 2009 - 02:11 PM

#2

You need to have your valves checked after the break in they are prob out of specs making it hard to start!

  • badburn

Posted April 12, 2009 - 02:12 PM

#3

Thats what i was wondering but yamaha said that shouldnt need it.

  • rpt50

Posted April 12, 2009 - 02:16 PM

#4

Do other experienced 4 stroke riders have trouble starting your bike? If so, then something is wrong with the bike. If not, then you need to work on your 4 stroke starting technique.

  • tnl

Posted April 12, 2009 - 02:21 PM

#5

Here is an old 426 video: http://www.yamaha-mo...troke_vid_a.mpg Also, did the dealer get it started smoothly with a kick or two? Find the compression stroke and start kicking there.

  • intensem1rider

Posted April 12, 2009 - 02:22 PM

#6

Upon cold start up, I usually like to twist the throttle 2-3 times to prime the cylinder with fuel. Pull out the choke, then DON'T TOUCH THE THROTTLE and kick with all your weight and follow through. If it doesn't fire on the first kick, try the procedure from start to finish one more time. If it still doesn't start then you have an issue!

Follow the manual on checking your valve clearances, it's really simple. I have seen brand new bikes from the factory with the valve shimming way off, but once set properly the yamaha valves wont budge for hundreds of hours if the air filter is kept clean.

  • mxdude1986

Posted April 12, 2009 - 02:32 PM

#7

Like said valves are off that y is hard to start dont mean bc is a new bike that they wont be off.

  • idacurt

Posted April 12, 2009 - 02:46 PM

#8

Is the jetting correct?

  • matt eee us

Posted April 12, 2009 - 02:53 PM

#9

Happened to me, when i got my YZ250f new. My float level was off, thats why it was a b**** to start.

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  • NewfieWR

Posted April 12, 2009 - 03:40 PM

#10

Give the throttle 2 or 3 twists before trying to start...pull out the choke.....push kick start down slowly one full stroke....then back up top...push down slowly til you can't.....then let it back up....& kick it hard.
It will start right up.

Just do what i said before you try anything else.....this is a cold engine start.

Report back :p

  • cf89

Posted April 12, 2009 - 04:50 PM

#11

I roughly have 15 running hours on it .


lol definitaely not 15 hours yet brad, not even close. no more than 4-5 running hours.

You need to have your valves checked after the break in they are prob out of specs making it hard to start!


exactly, if anything itll be his intake valves.

Do other experienced 4 stroke riders have trouble starting your bike? If so, then something is wrong with the bike. If not, then you need to work on your 4 stroke starting technique.


im an experienced 4 stroke rider. I dont have quite as much trouble as badburn, but it still is sometimes harder than normal to start.

but I agree, its all in the technique. I can start my crf 450 while sitting down on the seat. you need a strong kicking leg!


Is the jetting correct?


yes it is. maybe not perfect, but its pretty close. (stock)

  • gruberyz

Posted April 12, 2009 - 04:59 PM

#12

As others have posted on first cold motor start of the day twist the throttle through two full revolutions. Get good squirt of fuel into the intake. Then pull the choke push kick starter through one time easy. Then let it back up and jump on it usually starts one or two kicks. If I don't twist throttle takes ten to twelve kicks.

  • badburn

Posted April 13, 2009 - 02:04 PM

#13

ok guys Maybe i haven't been doing the proper starting procedure i havent been twisting the throttle to get fuel going right away i will try that. I will report back thanx

  • Wiz636

Posted April 13, 2009 - 02:14 PM

#14

I highly, highly doubt that your valves are out of spec...that simply does not happen with Yamahas that soon.

Chances are you just need to give it a twist of the throttle and then medium speed full kick. Do not twist the throttle at all while kicking it.

What are the temperatures that you are riding in?

  • badburn

Posted April 13, 2009 - 02:24 PM

#15

You guys are completely right i turned the fuel on, twisted the throttle 3 times pulled the choke she fired 2 kick. I very glad to know it was my error and not a mechanical one .
Thanx alot guys

  • gruberyz

Posted April 13, 2009 - 02:57 PM

#16

Glad that worked hated to thing you were going to end up with a massive pumped up right leg and regular left one....:p

  • theuberacer

Posted April 13, 2009 - 04:20 PM

#17

You guys are completely right i turned the fuel on, twisted the throttle 3 times pulled the choke she fired 2 kick. I very glad to know it was my error and not a mechanical one .
Thanx alot guys


Good! I just got my 08 YZ450 last week and I experienced a little bit of that issue the first time I started it, kicked and kicked and kicked and she finally went but it was tough. Then the next couple times I tried priming it, just twisted the throttle open prob 4 or 5 times and with the choke out she lights up 2nd or 3rd kick. :p By the way I absolutely LOVE the bike!

  • FinchFan194

Posted April 13, 2009 - 08:13 PM

#18

Like Wiz636 said though DO NOT crack that throttle while kicking your bike ever seen what happens when a 450 kicks back? Its like getting bucked by a bull and thats if the kickstarter isn't embedded into the back of your leg!





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