Question about 2005 Yamaha WR 450 F

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What jet kit should i use for my 2004 wr 450 with fmf slip on .i have a 14 tooth on the front 48 onthe rear for sprockets

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JD jet kits give you a few options

I ended up using The red needle at 5 notches down
up from 165 to 170 main.
up from 45 pilot to 48 pilot

You might just want to try a 170main first and see how it goes

Posted on Sep 12, 2010

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My Bike is Daelim VJF125 roadsport/roadwin fi Also does anyone know what size of front sprocket should I use to increase acceleration? fed up not being able to bolt at lights :D


Chains and sprocket kits for your motorcycle - DAELIM 125 ...

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Buy chain and sprocket kits for your motorbike or atv online for DAELIM 125 VJF 125 ROADSPORT.

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motorcycle parts for daelim vjf 125 roadsport euro3 2012

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Kit Daelim Vt 125. Brand: Regina. Quality: Reinforced O-ring. Original front sprocket: 14. Original rear sprocket: 42. Kit content: Chain, front sprocket, rear ...

Jan 06, 2016 | Daelim Motorcycles

1 Answer

I have a2008 yfz 450 power fmf header moto works pipe k&n filter no lid cam mod power shot wiseco stock piston. I believe my jetting is at 168 45 3rd down . When in 4-5th gear it revs high like if i need...


hi there it sounds like your final gearing of the bike not your jetting as it revs easily might pay to go up a tooth on your front sprocket give it a go it might help cheers

Jan 04, 2015 | Motorcycles

1 Answer

More power from tc 250 2010


Top end engine rebuild. Sprocket size depends on the type of riding. Standard should be OK for motocross. If you need more top speed install a larger front sprocket and a smaller rear sprocket. Divide the rear sprocket teeth by the number of teeth on front sprocket e.g 48/14 = 3.43 a lower number means higher top speed 45/15 = 3.0 but compromised performance at lower speed. For tight forest riding and steep hills Rear 48 front 13 = 3.69 etc is preferable.

Dec 21, 2012 | 2010 Husqvarna TC 250

2 Answers

Can you change tranny gears to decrease rpm's on highway? Or maybe change sprockets.


You can add teeth to the front sprocket or take teeth off of the rear sprocket. In the case of your bike , I do not think there is a 17 tooth front available so your best option would be to shorten your chain and drop from the 44 tooth rear sprocket to 40 tooth or a 36 tooth rear sprocket. That would be like adding one or two teeth to the front sprocket. Your stock is 16/44 so decrease from there. Be sure to ID your chain, get a chain breaker, and a new master link.

Feb 06, 2011 | 2004 Honda VT 600 C Shadow

1 Answer

07 YZ450F First gear is to tall but then it peaks out to soon along the long trail,wil changing the rear sprocket down a tooth help ?


Find out what the tooth count on the rear sprocket was from the factory and see if you have a smaller sprocket than stock. THIS WILL BE FOR A FASTER TOP END.
a larger sprocket will give more power /rpm less speed.
GOOD Luck

Jan 26, 2011 | 2004 Yamaha YZ 450 F

1 Answer

Kmx 125 fully ported modified for MX racing consumes too much gas,what will i do to restore it back to normal consumption,want to use it daily...thanks a lot...


Install a new cylinder and re-jet the carb back to stock. If the ported cylinder has been bored you will need new piston and rings also. I would re-jet the carb first and see if that change will suffice in the fuel economy area. Changing out the cylinder etc., is costly. Check the front and rear sprockets. If they are not the stock sprockets, ( 14 tooth and 48 tooth ), replace with stock. Please rate my answer.

Aug 27, 2010 | 2000 kawasaki KMX 125

1 Answer

Glowing RED exhaust pipe


try a bigger jet or its going to cause some damage. You can pull the choke on to get some more fuel in to cool it .
Check that the cam timing hasnt been played with, some change the exaust cam by a tooth to copy yz specs, on top dead centre, there is a little arrow on each cam that lines up with the rocker cover surface

Mar 09, 2010 | 2003 Yamaha WR 450 F

1 Answer

Yamaha r125


Just remove the chain cover then bend the tab on the lockwasher away from the nut so you can then remove the nut. Install the new sprocket and put the assembly back together. Stock gearing is a 13 tooth front sprocket and 48 tooth rear sprocket. The stock chain is 112 links plus master link. The chain is DID 520D 112L. Please rate my answer. Thanks.
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Feb 15, 2010 | 2008 Yamaha YZF-R125

2 Answers

What gearing for honda cr 250


Usually, it seems that changing the front sprocket is more cost effective and easier to do. The front sprockets are about $10-$20 and rears are normally around $40-$50. Usually 1T gearing changes made to the front sprocket are the equivilant of a 3T-4T gearing change to the rear. I personally would go up on the front instead of down on the rear. Right now your gear ratio is 3.846 (meaning every 3.846 rotations of the front sprocket, the rear sprocket makes 1 rotation) If you go down 2T in the rear (13/48) your gear ratio would be 3.692 giving you a little less torque and a little more top end. If you go Up 1T in the front (14/50) your gear ratio would be 3.571. This would be about the equivilant of a 46.5T rear sprocket. (If they made it) The nice thing about doing the front sprocket first is the cost. If you decide it's too much difference and you want something in between, you can put the stock 13 back on and then change the rear (and you would only be out the $$ for the front sprocket) If you start with the rear and decide it's not enough then you change the front you're out the $$ for the rear.

Jan 18, 2010 | 2002 Honda CR 250 R

1 Answer

2008 wr 450 how do i split the chain do i need 2 gring a link down so i can push it out ?


Yes you do need to split the chain but I would have a real good look at the condition of your sprockets 1st.Obviously you have run out of adjustment on the chain but taking a link out might not be the answer.With the rear wheel lifted,spin the wheel back and forwards a few times.Now, at the rear of the rear sprocket,pull on one of the chain links.Pull it away from the sprocket.If you can lift it away from the sprocket about 1/2 a sprocket tooth,both chain and sprockets need replacing.Just keep this in mind because a broken chain on 450's can do a lot of damage.Hope this helps

Jan 04, 2010 | 2005 Yamaha WR 450 F

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