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11 years, 325ccs, 5 valves later...

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TLDR:

09 450 leftover

Came from 125 2t 11 years ago

Power is fun

Makes cool sounds/occasional pop on decel

Cold starting sucked (bumped it)

Out of shape fat John is out of shape and fat

FC fat guy (255lbs) .53/6.0 springs/FF5 on the way next week

Changed oil/yamalube 10-40 dino/oem filter

Need to make some adjustments

Size 14 boots do not work with out of crate shift/brake lever settings

Must move bars forward/man boobs in way/6' feet tall with boots

Raise idle/order FWW/low rpm flameouts stink

Going to putt around on weekend practice day at local track

Having a beer trolling TT browsing owner/service manual

:smirk:

bike1.jpg

bike2.jpg

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For cold starting try twisting the throttle 3 times and pull the cold start choke, then kick.

+1 Mine was a bitch when new as well. It will start great once you get the procedure down and get a couple hours on it. Great bike! :smirk:

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I remember when i 1st started riding big Yamaha 4 strokes and how hard they were to start...until i learned 1 thing...NEVER touch the gas when starting them. At least none of the 426's or 450's ive ridden.

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I remember when i 1st started riding big Yamaha 4 strokes and how hard they were to start...until i learned 1 thing...NEVER touch the gas when starting them. At least none of the 426's or 450's ive ridden.

That's what I was also told about 8 years ago when I had my first 250f and have obeyed by that rule. Never had issues starting this way. Everyone has there own technique, you just have to learn what works for you.

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My '07 450 likes a pump or two on the gas no matter what when cold. I'ts when the engines are hot that you DON'T want any raw fuel ingested into the engine, otherwise you will be kicking for 15 min straight with the hot start pulled to get them lit off again ! :smirk:

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Must move bars forward/man boobs in way

:smirk:

My 06 450 likes a few twists of the throttle on cold starts as well. You'll just have to figure out what works best for your bike.

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my buds 2006 yz450 likes 3 whacks on the throttle then kick giving it NO gas, maybe lift the choke when cold but thats it. starts less then 3 kicks most times

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I remember when i 1st started riding big Yamaha 4 strokes and how hard they were to start...until i learned 1 thing...NEVER touch the gas when starting them. At least none of the 426's or 450's ive ridden.

depends on if it's cold or not. If it's hot outside yes. but in the cold 3-4 pump's will give the engine enough gas to fire up. Instead of having to tip it on it's side like some of the older big bore bikes. :smirk:

Edited by sledtrash

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While we are on the subject of the various ways of starting these beasts, i need to say that the only time my 03 450 absolutely refuses to start is when it is hot and the bike is dropped or laid over on its side. At this point i basically just let it sit for 10-15 mins because it simply WILL NOT start no matter what i do...is this a common problem?

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I remember when i 1st started riding big Yamaha 4 strokes and how hard they were to start...until i learned 1 thing...NEVER touch the gas when starting them. At least none of the 426's or 450's ive ridden.

This is true for any four stroke bike that's at normal operating temp, but a cold motor (by cold I mean not run yet) 2-3 twists of the throttle BEFORE you kick will save you some kicking, guaranteed. Try it.

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This is true for any four stroke bike that's at normal operating temp, but a cold motor (by cold I mean not run yet) 2-3 twists of the throttle BEFORE you kick will save you some kicking, guaranteed. Try it.

Mine starts 1st or 2nd kick every time when its cold with no twists, maybe im just lucky.

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While we are on the subject of the various ways of starting these beasts, i need to say that the only time my 03 450 absolutely refuses to start is when it is hot and the bike is dropped or laid over on its side. At this point i basically just let it sit for 10-15 mins because it simply WILL NOT start no matter what i do...is this a common problem?

In this situation I pull the hotstart and hold the throttle wide open and kick about 10 times to clear it out. Then I close the throttle and kick. Usually works.

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In this situation I pull the hotstart and hold the throttle wide open and kick about 10 times to clear it out. Then I close the throttle and kick. Usually works.

Wouldnt holding the throttle wide open flood it even more?

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While we are on the subject of the various ways of starting these beasts, i need to say that the only time my 03 450 absolutely refuses to start is when it is hot and the bike is dropped or laid over on its side. At this point i basically just let it sit for 10-15 mins because it simply WILL NOT start no matter what i do...is this a common problem?
Next time you encounter that situation, try this: Open the throttle all the way and hold it there. Slowly turn the engine through about 4-5 compression strokes. Not fast, not hard, just move air through the engine. Take maybe 30-45 seconds to complete the process. Then close the throttle and try a start using the hot start with the throttle closed OR with the throttle cracked open about 1/6. Always worked for mine.

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Ill give that a try the next time i dont see that small stump going uphill (Thats what happened last time). Thanks grey.

Edited by BlueMagiC

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Wouldnt holding the throttle wide open flood it even more?

It only gives one squirt on the initial opening of the throttle, which clears out when kicking while keeping it held open.

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