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Author Topic: CRF450X Stalling  (Read 1301 times)

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Offline Papwiel

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CRF450X Stalling
« on: November 05, 2012, 06:44:28 am »
Any of you guys experiencing the same?
When a bit low in rev's (especially when riding technical terrain) it tends to catch me off-guard by stalling and the gravity takes over.
Is there something to be done to make it better (less stalling) or do I have to change my riding style (whick means the bike is not what I want) ???
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Offline Dwerg

Re: CRF450X Stalling
« Reply #1 on: November 05, 2012, 07:06:25 am »
Nee wat kry dan maar vir jou 'n CRF230....
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Offline sidetrack

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Re: CRF450X Stalling
« Reply #2 on: November 05, 2012, 09:22:02 am »
Bigger or heavier flywheel mod ?
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Offline dirtWarp

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Re: CRF450X Stalling
« Reply #3 on: November 05, 2012, 10:04:44 am »
whats the sprockets sizes?

Change to shorter gearing (13-51 is standard) and increase your idle revs.
« Last Edit: November 05, 2012, 10:07:23 am by dirtWarp »
 

Offline edgy

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Re: CRF450X Stalling
« Reply #4 on: November 05, 2012, 10:14:18 am »
whats the sprockets sizes?

Change to shorter gearing (13-51 is standard) and increase your idle revs.


+1 :thumleft:
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Offline Papwiel

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Re: CRF450X Stalling
« Reply #5 on: November 05, 2012, 01:39:27 pm »
whats the sprockets sizes?

Change to shorter gearing (13-51 is standard) and increase your idle revs.


+1 :thumleft:
Sprockets are standard. Will try that and see if it works. Don't wana go the heavier fly-wheel rout yet, cause the bike is still brand new and I would like to keep it standard as far as possible.
I had a crf 230. What a lovely bike, but the front shocks are a bit soft for me. Other than that, great bike.
Thanx.
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Offline dirtWarp

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Re: CRF450X Stalling
« Reply #6 on: November 05, 2012, 03:52:37 pm »
I had/have the same issue with my 550.
Changing the sprockets made it more ride able, having it stall less.

It however still stalls at times but this is due to the fact that the bike simply has too much power for the very technical stuff and I can't seem to carry my momentum as I would on a 300 two stroke for instance.
You will definitely stall the CRF450 if you try to ride it like a 230 because you need to ride it faster or use the clutch much more

Look at the entries for the Roof of Africa:
175 riders on 300's
Only 4 riders on 450's  :o
« Last Edit: November 05, 2012, 04:00:59 pm by dirtWarp »
 

Offline Papwiel

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Re: CRF450X Stalling
« Reply #7 on: November 06, 2012, 06:33:38 am »
I had/have the same issue with my 550.
Changing the sprockets made it more ride able, having it stall less.

It however still stalls at times but this is due to the fact that the bike simply has too much power for the very technical stuff and I can't seem to carry my momentum as I would on a 300 two stroke for instance.
You will definitely stall the CRF450 if you try to ride it like a 230 because you need to ride it faster or use the clutch much more

Look at the entries for the Roof of Africa:
175 riders on 300's
Only 4 riders on 450's  :o

I agree, the 230 and the 450 are two very different bikes for different purposes.
The sprocket ratio, what do I change it to? 1 tooth smaller in the front OR two bigger at the back? Like I said the ratio at the moment is standard (not sure exactely what it is at the moment)
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Offline edgy

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Re: CRF450X Stalling
« Reply #8 on: November 06, 2012, 07:48:27 am »
depending on your type of riding maybe start with 1 smaller up front(about the same as 3 rear)
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Offline sidetrack

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Re: CRF450X Stalling
« Reply #9 on: November 06, 2012, 04:29:59 pm »
This mod is cheap and according to the article also helps with low end bog.

http://www.squadpage.com/pandora/Professor%20RedBeard450%20How-To%20AP%20Mod.pdf
« Last Edit: November 06, 2012, 04:30:35 pm by sidetrack »
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Offline BuRP

Re: CRF450X Stalling
« Reply #10 on: November 21, 2012, 09:30:59 pm »
1) re-gear ie gearing quite a bit lower, and do this by increasing the rear rather than going even smaller on the front. Oh, yes, longer chain then too
2) do that AP-mod but don't expect wonders if you still go too slow
3) use the clutch when the going gets slow
4) or alternatively mount a Rekluse (auto clutch) which will solve all in 1 go without doing any of the above, although dropping the gearing still helps.

You know the 230's better for technical stuff, you had one. CrfsOnly sells springs which, together with oil, makes for a quite good front end. Sure, dead compared to a 450 in open terrain, but you mentioned you doing technical stuff.

Edit: a 55 rear (less 7.8% topspeed) or a 57 rear (less 11.8%) I think you need. Keep the teethcount odd, best for wear.
« Last Edit: November 21, 2012, 09:36:38 pm by BuRP »
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Offline Papwiel

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Re: CRF450X Stalling
« Reply #11 on: November 22, 2012, 07:21:48 am »
Thanx for the tips. I'll try the sprocket option 1st and see how it goes. Just waiting for December break to give it some attention.
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