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Post by oldbritguy on Feb 17, 2022 21:56:48 GMT 1
I stripped the reed blocks for a good inspection and clean and saw they were different types fitted I have a new set of standard petals but was also considering fitting some fibre ones These ones are not going back in but would like to know if they are standard LC and if so which models. Also the little 45 degree cut away at the top does it go LH or RH side? John  |
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Post by dougw on Feb 18, 2022 16:02:20 GMT 1
My ageing brain informs me that the top set of reeds where fitted to the first batch of 350`s, the bottom set superceded them.
I am very likely wrong.
I have a set of the Showe dual stage carbon reeds to try on mine (4L0 with YPVS reed blocks) , but want to ride it a bit more in better weather to get familliar with how its running with the current reeds, its only recently finished being run in.
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Post by oldbritguy on Feb 18, 2022 19:59:29 GMT 1
Cheers Doug.
I have some new Hy Tech reeds to go in and was a little amused when I stripped these ones out. Obviously been a repair with whatever was at hand at some point
John
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Post by Tobyjugs on Feb 18, 2022 21:04:56 GMT 1
I read somewhere that the top and bottom sets of reed petals were fitted with different specifications to achieve a desired performance criteria.
Are both cylinders the same?
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Post by oldbritguy on Feb 18, 2022 21:33:31 GMT 1
I read somewhere that the top and bottom sets of reed petals were fitted with different specifications to achieve a desired performance criteria. Are both cylinders the same? Yeah Tony Both cylinders identical 4L1 and have now been given the Fahron treatment. I was stripping the old reeds to fit the new ones and saw the difference to those fitted. I have no history of regarding the bike or knowledge of any previous work. Just a little intrigued that was all. John |
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Post by Tobyjugs on Feb 18, 2022 21:37:22 GMT 1
It's nice to see this sort of thing posted.
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Post by oldbritguy on Apr 17, 2022 19:56:55 GMT 1
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Post by JonW on Apr 17, 2022 23:46:58 GMT 1
Hmm... Sorry John but the are the reeds we love to hate. Can you return them?
Spoken about many times on the forum, but the question remains 'will the big petal ever open?'...
Have a search, but consensus is 'no'. Thats why they are good for torque, just no good for top end.
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Post by Chewie01 on Apr 18, 2022 0:10:14 GMT 1
I got a set from Norbo last year and installed them on my F2 with just the 'rev-plat', as they call it.
The bike has great mid range, but does lack a bit on the top end, but that could well be down to the Micron pipes I'm running on it.
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Post by oldbritguy on Apr 18, 2022 9:56:39 GMT 1
Hmm... Sorry John but the are the reeds we love to hate. Can you return them? Spoken about many times on the forum, but the question remains 'will the big petal ever open?'... Have a search, but consensus is 'no'. Thats why they are good for torque, just no good for top end. Thanks Jon, although I was hoping for a slightly more positive review of these. I know there are different views on just about any part we fit to our bikes and that is what makes this forum such a great source of info and support. Experience is good. I have a set of new Yam steel ones and a set of hi tech fibres but thought I would go with these. I am looking for usable mid range for the road as this bike will never see the track so lack of top end may not pose too much of an issue. The fact I have three different sets means I can chop and change to find a happy medium. My question on fitting petal stops seems irrelevant now 🥸 John 🙂 |
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Post by oldbritguy on Apr 18, 2022 10:01:08 GMT 1
I got a set from Norbo last year and installed them on my F2 with just the 'rev-plat', as they call it. The bike has great mid range, but does lack a bit on the top end, but that could well be down to the Micron pipes I'm running on it. Thanks Chewie Got these from Norbo too and going in a fresh build so they are not an effort to iron out any flat spots. Like I said to Jon, looking for low to mid range so they might be ok but will also try the alternatives. Did you use the little metal plate or keep the original petal stops? John🙂 |
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Post by Chewie01 on Apr 18, 2022 10:22:25 GMT 1
The instructions I got with the reeds said to just use the little metal plates, which were called rev-plates in the installation instructions. As I tend to follow manufacturers recommendations due to them knowing more about their product than I do, that's what I did.
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Post by headcoats on Apr 18, 2022 10:40:58 GMT 1
Was there any dyno results to show how the Boyeson reeds perform ?
I was always told to give them a miss and stuff like the VForce reeds are good but guess that's the whole reed assembly and not just the reeds
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Post by Chewie01 on Apr 18, 2022 12:32:30 GMT 1
I did see some back to back testing results when I was looking around for reeds, but I have no idea where I saw them. If memory serves me correctly it was an extract from a book on the subject. However, I think it's all out of date now with the introduction of VForce.
I also did look into the VForce option, but I found it was a bit of a minefield with different versions of the blocks and the copies. In the end I ended up going with the Boyesens because I know they would fit, they are reasonably priced from Norbo and I have a standard engine and carbs so I didn't expect them to make that much difference.
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Post by JonW on Apr 18, 2022 13:49:07 GMT 1
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fabiostar
Thrash Merchant
the older i get the faster i was.
Posts: 395
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Post by fabiostar on Apr 27, 2022 20:28:36 GMT 1
prob of no use but many years ago. when i raced 200s we used to fit LC reed cages and when the reed stops didnt get used the carbon type reeds used to start to break up along the lower edge? like they frayed, once the reed stops were installed the problem was solved... so id fit the reed stops.
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Post by dougw on Apr 28, 2022 16:47:53 GMT 1
prob of no use but many years ago. when i raced 200s we used to fit LC reed cages and when the reed stops didnt get used the carbon type reeds used to start to break up along the lower edge? like they frayed, once the reed stops were installed the problem was solved... so id fit the reed stops. OEM V Force 3 in my KTM 250 didn`t have reed stops , on a fast open track when I got brave enough to rev it hard it broke the ends off a couple of reed petals. KTM stopped using the V Force 3, couldn`t get hold of the petals at the time so replaced the 3 with a V Force 4 , which has stops. |
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