wr450 questions

[marks]

Hi

About 4 months ago I brought a road legal wr450 and have since clocked up about 50hrs of mainly trail riding.

I love the power and handling but am struggling a bit in the real tight stuff.

Basically there are 2 issues - I find I have to be very accurate/gentle with the throttle in the tight stuff as it can be a bit "energetic" if you give it a fraction too much. After a couple hours of this I get quite a tired hand from trying to be so precise. I read somewhere of an after market throttle that has different "cambers?" too allow for slower response at small throttle openings with a big hit in the last part of the throttle travel. Anyone used something like this or know where I could get something.

The other problem is the light flywheel and high compression causing it to stall when hitting roots and other knarly bits while tricking along a low speed. The jerk when I stall is often enough to throw me off balance and down I go....

I was thinking of getting a Rekcluse auto clutch to help with this - anyone used one.

Any other (polite) suggestions appreciated....


cheers

Mark

[dammad1]

The WRF should have a reasonably heavy flywheel unless it has been changed.
It is a bit of a heavy bike to through around in the tight stuff, but if you are having problems stalling it all the time maybe you need to work a little on your technique with clutch and throttle control?
Also what gear are you trying to ride in through this stuff? If it's tireing you out you may want to try and ride it a gear higher to keep it smooth, the bike has more than enough torque to pull a higher gear.

[Wellyman]

Whats the gearing set as mate? probaly still using the standard gearing, may just be a bit to tall for the bush work, try a smaller front sprocket prehaps. The flywheel shouldnt be the problem..
WM

[telliman]

Whats the gearing set as mate? probaly still using the standard gearing, may just be a bit to tall for the bush work, try a smaller front sprocket prehaps. The flywheel shouldnt be the problem..
WM

classic!!!

[Wellyman]

classic!!!

Errrr... ok then...
WM

[marks]

Hi

Thanks for the responses

gearing stock is 14/50 and I'm running 13/50. Flywheel is stock (bike was new)

I'm sure that someone who knew what they where doing would be fine with appropriate clutch/throttle control but while I'm learning to work around the problem of stalling it makes the tight stuff hard work. If the trail is open enough to just "aim and fire" the bike works really well - it's just those inevitable grunt your way to the top of the rutty snotty hill losing momentum as you go and hit the last damn root and clonk - I stall and go tits up. A higher gear would just shudder and stall that much earlier.

Problem is I really like that sort of riding....

[Danger]

Here is the G2 throttle cam that you are thinking off.

http://www.g2ergo.com/sitebody/tcs4t.shtml

A customer of mine uses a recluse auto clutch on his 07 WR450. He loves it, no stalling. I've ridden it, its not really the sort of thing I like but would help in your situation.

[Fryin Finn]

I had an 03 WR450 and I stalled it a lot. A heavier flywheel would really help but there were none available then.
Yesterday I rode a KTM 250 EXC_F with a rekluse clutch - took a few minutes to get used to - nearly took out a tree in the first 10m but that was mostly due to not finding the brake lever where it should be. The only tricky thing I found with the clutch was for it to freewheel at low revs so I blipped the throttle on down hills and kept the engine revving where I could. It made riding the snotty bits real easy.
I would definitely recommend it for the big WR to tame the snatch bottom end and maybe make it less tiring to ride too.

[marks]

Here is the G2 throttle cam that you are thinking off.

http://www.g2ergo.com/sitebody/tcs4t.shtml

A customer of mine uses a recluse auto clutch on his 07 WR450. He loves it, no stalling. I've ridden it, its not really the sort of thing I like but would help in your situation.

Thanks for the link - I couldn't find it. This appears to be about the only option out there.

I had an 03 WR450 and I stalled it a lot. A heavier flywheel would really help but there were none available then.
Yesterday I rode a KTM 250 EXC_F with a rekluse clutch - took a few minutes to get used to - nearly took out a tree in the first 10m but that was mostly due to not finding the brake lever where it should be. The only tricky thing I found with the clutch was for it to freewheel at low revs so I blipped the throttle on down hills and kept the engine revving where I could. It made riding the snotty bits real easy.
I would definitely recommend it for the big WR to tame the snatch bottom end and maybe make it less tiring to ride too.

I'm encouraged to hear that I'm not the only one who has had stalling problems. I have only been riding about 14 months and had been viewing these changes as "trainer wheels" for an old and inexperienced wannabe

Sounds like the ktm has the earlier model z-start clutch. the rekluse z-start pro kit allows you to keep a fully operational clutch - its a bit dearer but I think worth it.

I hope that the clutch will eventually pay for itself in reduced damage repairs and physio costs - I dropped the damn thing 7 times over the last 2 rides ... freaking indicator lenses are $20 each - feck

Oh well out with the credit card.

Thanks for responding guys.

[chris]

Swap it for a WR250 and once in the tight stuff, the light will be revealed.

[chris]

Mind you, you answered yor own question here http://www.kiwibiker.co.nz/forums/sh...9&postcount=12

[takitimu]

You've might have already done it, but upping the idle speed helps as well, for what it's worth I had the same problems with the KLX when I first got it.

[jimmy 2006]

You've might have already done it, but upping the idle speed helps as well, for what it's worth I had the same problems with the KLX when I first got it.

leave the 450 in the shed and take your sons kdx200. much better for the throttle happy me thinks.

[dammad1]

Swap it for a WR250 and once in the tight stuff, the light will be revealed.

Yep I agree, and practise, and practise some more.

[Motu]

I have no experience with your WR450....late model high tech is not my thing.But when I moved to a 4 stroke trials bike I had a lot of low speed stalling...and low speed is what trials is all about.The trick is to stay on the throttle as much as possible,kinda hard with a 450 though....it stalls with shut throttle,so it needs to be open.The trick,and you see two stroke trials do this too - is to blip....blip,blip,blip.Momentum,and blip.I use 1st gear where a 2 stroke would be in second,and stay on the gas.....even keep the throttle open with the brakes on....clutch slipping.