Author Topic: RD Reed valve modification  (Read 40636 times)

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Offline Cargers

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Re: RD Reed valve modification
« Reply #15 on: April 10, 2013, 11:32:17 PM »
I have fitted YPVS reed cages with carbon reeds of unknown make on my 350. It took a lot of grinding out of the inlet ports and you have to be careful not to break through the casting. Apparently they are the same reed area as TZ 750 reed blocks which are physically much bigger on the mounting flange. They work very well with the 34mm carbs I have now fitted.
Ian
Sondel Sport Kenny Roberts/Steve Baker Replica.
Triumph Daytona 900
4 cylinder RD500 project.
Ex race RD350 project
THREE TIMES THUNDERSPRINT WINNING SIDECAR PASSENGER

Offline MarkFalvey

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Re: RD Reed valve modification
« Reply #16 on: February 16, 2022, 01:10:04 PM »
Parts are getting expensive/rare and I'm not game to do anything irreversible to my barrels (off the track, anyway) to fit big cages in.

After nearly 20K views but no entries for years, has anyone come up a good cage/reed combo for an RD350 with 34mm round-slides/no filters/low-end biased chambers?  I'm leaning towards removing the bridges from the stock cages and single petal Boyesens.  There are so many conflicting opinions, new websites and more recent products, I think I can see my own back, up ahead :)
« Last Edit: February 16, 2022, 01:14:17 PM by MarkFalvey »

Offline betty foRD

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Re: RD Reed valve modification
« Reply #17 on: February 19, 2022, 11:51:50 AM »
Mark, if your barrels have any mod at all, then a small bit of material removal to fit YPVS blocks surely isn’t a big deal. But if the barrels are still 100% standard then really no point to be using 34mm carbs…
A bit of Reed cage modification on the standard ones will assist performance but everything works back from porting and pipes … fix that first then determine what’s needed to support upstream breathing…
Rev 'em till they rattle

Offline andy_g

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Re: RD Reed valve modification
« Reply #18 on: October 21, 2022, 08:22:50 PM »
Just put V-force in fromna yz85
Two pics. One is the V-force4 on the top. The ones currently fitted are V-force3 v382 model from memory.
Picture attached of yz85 V Banshee. The stuffer on the banshee is way way to big.

Offline andy_g

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Re: RD Reed valve modification
« Reply #19 on: October 21, 2022, 08:23:32 PM »
Pic 2

Offline andy_g

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Re: RD Reed valve modification
« Reply #20 on: October 21, 2022, 08:24:27 PM »
Pic 3

Offline andy_g

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Re: RD Reed valve modification
« Reply #21 on: October 21, 2022, 08:25:10 PM »
Pic 4

Offline KGR33N

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Re: RD Reed valve modification
« Reply #22 on: November 11, 2022, 05:23:21 PM »
Pic 4
Hi Andy did you race this year? I've been out of touch with the classic race scene so was wondering if you guys were still competing?
Yamaha RD 250 C (1976)
Yamaha RD 250 C (1976)
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Yamaha XJ 600 N Diversion (1995)
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Offline andy_g

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Re: RD Reed valve modification
« Reply #23 on: October 23, 2023, 10:01:43 PM »
Blimey, been 12 months since being on here. Yes still racing. Had the RD out this year and last. However mostly been on the TZ350.
will be back out in 2024 with some of the team still on RD's etc.