HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
Mark537

09 yz450f harescramble setup

22 posts in this topic

I just got an 09 yz450f. I had an 08 so not much of a change. This is what I have done so far

gytr fww

rekluse clutch

fmf megabomb header and 4.1 exhaust

fmf powerup kit

barkbusters

My next stuff to work on is the bar setup. I have been reading about taller bars possibly. I am also curious if anyone has played with the factory upper triple clamp mounting positions and your thoughts on them. I am also looking for help on any suspension setup help. I normally run about 100mm of sag. I am 6ft and 170-lbs probably around 180 geared up. Any tips or advice is greatly appreciated.

Share this post


Link to post
Share on other sites

IMO, the bike is both more comfortable and handles better with bars set taller and farther forward than the base OEM position. I am 5'10ish and ride mostly off-road and desert races, and I find the Pro Taper Windham bend to be an enormous improvement on both scores. The Windhams are about 15mm taller and position your hands about the same amount forward of the OEM position on my '06, and with this, the bike is very easy to stand over for extended periods. The bars give me enough room to stand in a relaxed upright position with the bars still far enough forward of my legs for good control, and change the whole dynamic of how the front reacts to rider input in corners while seated.

Share this post


Link to post
Share on other sites

Thanks grey I was actually reading a post where you were talking about how you liked the windham bend. I am probably going to order a set. Did you cut them down at all? Do you have any information about the factory 09 triple clamp positions? Do you think the farther formard postion is better?

Share this post


Link to post
Share on other sites

I would lean toward the forward position, but that's something you'll need to experiment with. My '06 only has one set of holes in the top clamp, and I don't know where that is relative to the two sets you have. The bar clamps themselves are offset, of course, so they offer a forward or rearward bias, and mine have always been set in the forward position.

The YZF has always liked the rider forward, so in that regard, I think it helps you be more comfortable with sitting up there. I did not cut the bars down from their full width, although I could probably lose an inch off the ends and not miss it much.

Share this post


Link to post
Share on other sites

Thanks I ordered a set of the bars and this weekend will hopefully get a chance to test some if this out. I also noticed that the front end felt a bit harsh. Would it make it more plush to lower the oil level in the forks 5mm?

Share this post


Link to post
Share on other sites

Yes, lowering the oil level in the outer chamber can help that, but you shouldn't go below 300cc. You can dump 5cc each side by pulling the forks out of the clamps and pumping it out the vent caps.

The YZ fork is a little tougher to set up cushy soft for roots and rock gardens while still retaining good performance at speed, but it's completely doable. Same with the shock. If you ever decide to do any rework on these, let me know.

Share this post


Link to post
Share on other sites

I'm under 6 feet and the oem bar rise for the past few years have seemed low and close as many others stated. I'm using 5mm spacers and so far it's been good for my torso height and riding position.

Share this post


Link to post
Share on other sites

I just got an 09 yz450f. I had an 08 so not much of a change. This is what I have done so far

gytr fww

rekluse clutch

fmf megabomb header and 4.1 exhaust

fmf powerup kit

barkbusters

My next stuff to work on is the bar setup. I have been reading about taller bars possibly. I am also curious if anyone has played with the factory upper triple clamp mounting positions and your thoughts on them. I am also looking for help on any suspension setup help. I normally run about 100mm of sag. I am 6ft and 170-lbs probably around 180 geared up. Any tips or advice is greatly appreciated.

I have an 08 with a most of the same mods, only other thing I think you should do is send your suspension off to TBT for a revalved, I absolutely love my TBT suspenders!

Share this post


Link to post
Share on other sites

Hey grayracer, I recently rebuilt my forks in my 09 yz450, I added 350cc of oil and they are a bit harsh, how do I lower the fork oil amount??? Could you go into detail on the process please, thankyou

Share this post


Link to post
Share on other sites

I have an 08 with a most of the same mods, only other thing I think you should do is send your suspension off to TBT for a revalved, I absolutely love my TBT suspenders!

What rekluse springs are you running? I was thinking about putting in the stiffer engagement springs and running my idle a little bit higher. To try and guarantee no stalls.

Share this post


Link to post
Share on other sites

What rekluse springs are you running? I was thinking about putting in the stiffer engagement springs and running my idle a little bit higher. To try and guarantee no stalls.

Yes I run the stiffer setup on my z-start pro and I removed 3 ball bearings to make it smooth at low speeds. So far it is working great, haven't raced this new setup though and as we all know a race is when I will truely find out if it is working properly.

Share this post


Link to post
Share on other sites

I found a used z-start for my 08 450yz which I am setting up for hare scrambles in n. Cal. I race the A senior class. I found a z-start used for 300 or do I buy a exp for 400.00 new. My whole reason for buying it is not to stall it while racing. My question is do you have to readjust them much, do you have to replace clutch plates sooner then normal, do you notice any other benefits from the rekluse besides not stalling?

Share this post


Link to post
Share on other sites

My question is do you have to readjust them much, do you have to replace clutch plates sooner then normal, do you notice any other benefits from the rekluse besides not stalling?

If it's a Z-Start Pro (uses your normal clutch cable) then keep it. It's better than the EXP.

To your questions above, no, not after the original set up, no, and yes, quite a few. If you don't get a complete set of instructions with the clutch, get them from Rekluse directly by calling or e-mailing them. I only had to try two different settings before I got mine where I wanted it, and I haven't really tinkered with it since then.

The plates I installed it with were the used steels that came with the clutch and the 5 year old OEM plates that were in the bike. The clutch worked fine for all of the next year, at which point I decided to replace the plates because the clutch was dragging more than it should have. The new set of Rekluse steels (have to use theirs) was only $40. I used a set of plates from an '09 YFZ450R quad, which had more to do with a parts guy mix-up than a plan, but it works extremely well (the YZ450 set is 8 of 5TA-16321-00-00 drive plates, while the YFZ clutch used 6 5TA's in the middle with 2 5VY-16321-00-00 plates, one at the top and bottom of the stack. The 5VY's are from an R1).

Besides prevent most brake stalling, the clutch will, if set up right, prevent virtually all stalling under power in gear, and is a huge help in the tight stuff, especially with the close ratio MX transmission. I run my bike geared at 13/48 and no longer feel any need for a lower first gear.

You can stall the bike with either the brake or during low speed operation if you have in way too high of a gear, and the clutch can make you lazy about downshifting after a while, so you may have to think about shifting while you get used to it. Also, if you're one of those people who jacked the pilot jet way rich to stop a bog or decel backfire, you'll probably find that the engine is prone to flaming out on sudden on-off throttle maneuvers at low speeds.

Otherwise, the Rekluse is a great asset for off-road work. But make a habit of pulling the clutch when you start the bike. The fact that the engine will turn over doesn't mean it's not in gear....

Share this post


Link to post
Share on other sites

I run that flywheel, too, but it does more to improve low end power and traction than it does to prevent stalling. But no, if stalling wasn't an issue, what would the reason be?

There's brake stalling, which is annoying, but really pretty avoidable, but the real problem is dealing with the nasty, tight stuff where you're constantly riding the clutch. Sooner or later, you screw up. With the Rekluse , I never have to restart the bike during a race unless I crash.

Share this post


Link to post
Share on other sites

I have to say on my 09 yz 450 i have the rekluse core exp..I installed the heavy springs and you have to have the jetting pretty spot on or itll keep stalling..I spent alot of time on the phone with rekluse and thats what fixed my stalling with a rekluse..Now i love it!

Share this post


Link to post
Share on other sites

x2 on the revalve. the only better things I have done to my bike is the flywheel and moving the new windham bend bars forward. Loving the bike now but it mandates rider forward to corner good.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0