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Joined
9/9/2013
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Chester, GB
Edited Date/Time
2/22/2025 5:45am
Before I get jumped on, I realise this should be a very easy bolt on part,
I have come across an issue and just need help identifying what part I need to order to resolve not being able to install vforce just purchased, for an RM125 2007
This is the intake manifold off the bike which fits into the stock reed block,
As you can see this won't fit into the v force, I presume there is a manifold without the flanges which will work with the vforce, but hoping some on here may know what that part number is?
Thanks in advance
Pictures aren't showing!
You need to carefully remove the wings (reed stuffers). Additionally the opening of the reed block needs to be matched to the intake boot opening. Every one I have installed there was a mismatch and needed to be matched..
Should now show, thanks
Bust out your hacksaw, should have come with instructions? Gentle cut of stock reed boot stuffers, then surface boot on flat plate with 220-400 grit sand paper….
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Got it thank you!
Got the reed stuffer removal part from your explanation and sandman's pictures, Thank you!
Sorry for the ignorance, but what tool would I use to match them, and is it likely i'll be taking material away at the boot or the vforce it's self to match them?
Thanks again
You could use a dremel or ever a file but you may need to remove the reeds from the block to prevent damage from the file. Trace the opening on the block so you know where to cut.
Got it, thank you
I used to use a stanley knife to cut them off for vforces. I don’t recommend the procedure normally, that’s why I tend to use boyesen (haven’t ran into boyesens that needed cutting, they might exist?). I used vforces on 5 bikes and 1 or 2 of them (been a while, forgot emthe exact number) got an airleak there. Now I might have not been careful or precise enough, but not a product I’d recommend. Didn’t notice a lot of gains as well m, to be honest! Although dynos tend to show a little gain normally I believe. Best of luck!
I’d prob say dremel as well. I own one, but still used a stanley knife for my procedures, hack and slash!
Good luck!
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Reason I don’t like them, not a big noticable gain, leaked once or twice, and in that case you can’t even use your old ones!
Best of luck!
If you did not see a gain it's because you failed to re-jet correctly and/where air leaking. .
If you check dynos on vforces there’s hardly any gain lol. and generally they don’t need rejetting I believe? It made some of them a bit more aggressive, but power wise, I’m yet to see a pipe and a reed beat porting + head mods. Hope OP has good luck w them.
The vforce is more responsive because it has 2 times the reed tip area. A dyno may show nothing. Every one I have ever installed required re-jetting. Some may not.
I've bought a V-Force to go on my RM125, but haven't fitted it yet. I'm planning to buy another intake boot as I'm curious to test both stock and V-Force to see if there is a worth while improvement.
I must say its surprising how much difference there is in design. The stock reed/intake looks very open and the casting fins are thin. The V-Force looks a lot tighter and being plastic has that long thick band running across the centre. Seems a bit restrictive to me
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