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henrics

wr450 jets, what are they?

3 posts in this topic

Have just removed the ais from the bike and i shuold probably rejet.

Open endcap (pro moto billet style),airbox snorkle removed, sea level.

yz throttle stop.

There was a few jets with the bike,these came in a plasic bag

should i use them?

175 mj

50 pj

45 lj

110 ?? fits at nr 2 in the picture below there in no jet there now(stock)

stock jets where

mj 162

pj 45

60 lj

#70 in the nr 1 in picture

empty in nr 2 in picture

What are nr 1 and nr 2 in the picture when should i mess with them??

20080312%200021.jpg

Is this right then, the starter jet is only activated when the choke is on.

20080312%200031.jpg

air%20jets.jpg

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Have just removed the ais from the bike and i shuold probably rejet.

Open endcap (pro moto billet style),airbox snorkle removed, sea level.

yz throttle stop.

There was a few jets with the bike,these came in a plasic bag

should i use them?

175 mj

50 pj

45 lj

110 ?? fits at nr 2 in the picture below there in no jet there now(stock)

stock jets where

mj 162

pj 45

60 lj

#70 in the nr 1 in picture

empty in nr 2 in picture

What are nr 1 and nr 2 in the picture when should i mess with them??

20080312%200021.jpg

Is this right then, the starter jet is only activated when the choke is on.

20080312%200031.jpg

air%20jets.jpg

You will probably never need the 50 pj or 175 mj. The 45 lj could be used. I switch between a 52 and a 40, depending on weather. The main air jet is the #2 pic and is fixed, I believe at 200. I don't think you'll need to change it. The 70 (pic 2) is the pilot air jet and you only change it if you mod the ACV to YZ spec by blocking it closed (it can also be blocked open), but then you'll need a smaller pj, too. (you have an EU bike, so I don't know if this applies to you.)

Both air jets control vacuum at their respective jets and alter how much fuel gets pulled through them.

Yes, starter jet only works with choke on.

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Thanks

A quick and precise (spelling) answer.

Is there any advantage with removing the ACV?

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