Hello and what is this bolt?

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Haha nice one Bushie, "hammer of Thor" may need it's own counterbalancer!

For the valve springs some hardened and surface ground tool steel shims might do the trick, noticed some aftermarket ones have small grooves to hold some oil and prevent 100% contact/galling I guess.
Looks like Kibble have complete solutions for all valvey gear in their components/blanks section. Those DLC coated valves are purrdy!

Regards,
Rgl
 
rgl said:
Will look at trying Taff's dual valve spring mod I think
Click to expand...

the seated pressure of the original valve spring is 140LB, the DVSK I supply are on 87LB when compressed to 36mm which is where you want them. my supplier changed the specs of them without any warning, so much so that I had three old style couldn't get even one more kit - a fourth one to make up a kit, and ended up keeping them for myself.

If they are over compressed they will of course increase the seated pressure. I had to get the measurements done and then test a head without any shims first. after a weekends racing there was no wear at all but I figured that a 0.1mm steel shim would be a positive thing to fit. they then had to be ordered. the kibblewhite's are naturally stronger but don't ramp up like mine do as they get compressed.

I've had the springs out a few times since and there is no movement or problems, no split shims etc.

I'm not going to leave any kind of open gate comment here as it'll be used time and time again so I'll leave it at that.

regards

Taffy
 
Thanks for the info Taffy, sounds like you have it sorted.
-RGL
 
are you stirring a bit, davo? just as the boys are calming down a bit. good (?) timing :roll:
 
Sorry Ned, couldn't help myself :oops:
Was only having a shot at Bushie and I think he would take it in good humor. I am not game to have a shot at Taffy :paranoid:
Timing was late as I was away camping for the weekend with the family. Read this post last night and couldn't help but shake my head. Some of the stuff Bushie and Taffy have been posting is funny.
Personally I hope both of them don't leave UHE they are both colourful characters to have around.

I hope you're well and fighting fit Ned
 
Davo said:
Sorry Ned, couldn't help myself :oops:
Was only having a shot at Bushie and I think he would take it in good humor. I am not game to have a shot at Taffy :paranoid:
Timing was late as I was away camping for the weekend with the family. Read this post last night and couldn't help but shake my head. Some of the stuff Bushie and Taffy have been posting is funny.
Personally I hope both of them don't leave UHE they are both colourful characters to have around.

I hope you're well and fighting fit Ned
Click to expand...


absolutely Davo its no problem at all .. did you take your goat camping ? :D

RGL yes the kibblewhites are very nice valves, slightly lighter than OEM and longer wearing, they are available in 1mm OS which works very well with a recut of the stock seats, and a bit of unshrouding, for ordering valves etc the heads are the "same" as the 2007 ktm 525. I got mine from DJH on ktmtalk, they came nicely packaged complete with bubblewrap and he was super easy and very professional to deal with.

regarding the seated pressure increase the valves were OEM, the Head Stock, and the valve spring kit was installed as it came in the post, bubble wrap free, ie not possible to install it with any less pressure. if there are a number of versions around it could explain the discrepancy. eg. one of the 4 inner springs in the kit i received was shorter than the others.

FWIW I am incredibly impressed with Taffys last post above, just what you would expect to see from a "dedicated specialist" :cheers: :cheers:
 
I just fired my engine tonight after installing Taffy's DVSK with the 0.1mm shims... sounds good on the stand, I'm racing it this weekend in an Enduro... I'll post up my feedback after the weekend.
 
FWIW, member Faust did some load cell testing

viewtopic.php?f=5&t=11115

seated pressure oem conicals 40 Kgs (88lbs) I got a bit less.

It was not possible to get 36mm installed length on the DVSK I received, even with no shim.

2 other links on the subject of "the" DVSK
http://husaberg.org/forum/viewtopic.php?f=5&t=9678
http://husaberg.org/forum/viewtopic.php ... 72&start=0

regarding wear of the springs and head with the thin shims check after 40 hrs "racing" .

the shims should be minimum 0.4mm thick and 2 Rockwell points softer than the springs.

also FWIW The 36mm KW intakes were a perfect length to use with the TW DVSK i received once I had recut the seats
 
well there's our discrepancy! I had the valve springs tested by a professional company with a spring tester and I'm really not sure what tool Faust is using there? can anyone explain what the tool is? not the digital box but the TOOL?

the 'one-third' is the difference between a kibblewaite and the factory conical if I recall and not my sets. my first set was with Sparks and we got kibblewaites, they then decided that they would only deal with the wholesale trade so my supply route was cut off.

it is true that my sets fit either spot on or slightly over compressed, the nice thing is that a numpty has to have the minimum pressure as their maximum thus not one engine failure. a huge sigh of relief. :shock: :shock: :shock:

you have long been playing mischief bushie and you know it. from what I can work out, you are saying that I supplied you with my extended spring sets and then also sent you instructions asking you to still fit the thick washers even though the fitment height would have stated 36mm. so you are saying you cheekily fitted them at 36mm but quote all the pressures of springs compressed to somewhere around 32-33mm?

as I say, no problems with my silver steel shims. and I'm not fixing what isn't broke. and my spring kits are NOT those that Faust used pure and simple. Mine have to come from abroad and I pay import duty on them so there's a clue! and I wouldn't have to do that if they were the sets Faust says - or you imply.

when you see the damage the conicals do you question WTF the factory has on its mind?

Taffy
 
Taffy said:
well there's our discrepancy! I had the valve springs tested by a professional company with a spring tester and I'm really not sure what tool Faust is using there? can anyone explain what the tool is? not the digital box but the TOOL?

my results concur with Fausts results, make of that what you will but I suggest you test them yourself in a stock head with stock valves

the 'one-third' is the difference between a kibblewaite and the factory conical if I recall and not my sets. my first set was with Sparks and we got kibblewaites, they then decided that they would only deal with the wholesale trade so my supply route was cut off.

it is true that my sets fit either spot on or slightly over compressed, the nice thing is that a numpty has to have the minimum pressure as their maximum thus not one engine failure. a huge sigh of relief. :shock: :shock: :shock:

you have long been playing mischief bushie and you know it. what a load of bollicks and Tosh from what I can work out, you are saying that I supplied you with my extended spring sets and then also sent you instructions asking you to still fit the thick washers even though the fitment height would have stated 36mm. so you are saying you cheekily fitted them at 36mm but quote all the pressures of springs compressed to somewhere around 32-33mm?

no, you have missed the point again, (it is always the same trying to communicate with Taffy sigh), FWIW I still have the emails and the maximum installed length possible on the oem valves in the stock head was less than the 35.2mm figure you made up to look " impotent"

I don't know what you supplied me with, when i inquired why it was not possible to fit them at 35.2 or bigger as per your instructions your new instructions to me were "you just got far too anal all you do is up the seated pressure"

where you are confused is that at a later date I fitted non OEM oversize valves, the nice kibblewhites allowed your DVSK to be fitted at the correct length

as I say, no problems with my silver steel shims. and I'm not fixing what isn't broke. and my spring kits are NOT those that Faust used pure and simple. Mine have to come from abroad and I pay import duty on them so there's a clue! and I wouldn't have to do that if they were the sets Faust says - or you imply.

you missed the point again, I'm not implying that your DVSK is the OEM one, I am pointing out that the OEM DVSK is better value. $66 us from partspitstop

regarding the shims and wear : look underneath the thin shims, at 40 hours

when you see the damage the conicals do you question WTF the factory has on its mind?

dual springs offer the safety of redundancy if one breaks, however claiming that your current version of DVSK reduces the seated pressure over oem is glaringly incorrect unless both me and Faust have made the same error in measuring seated pressure of the oem conicals and the set you supplied me with is something actually intended for a fordson major.

I notifed you of the descrepency in installed length and seated pressure and got told i was being anal. and you wonder why I give you a hard time :roll:

Taffy
Click to expand...
 
Oh not the red type! now I'm really done for! :lol: :lol: :lol:

If you measure the OEM conical in the same compressed state that they would be on the bike, in the engine it is if I recall 100LB. the DVSKs at 36mm reduce that to 60LB on the outer spring. accepted, It is hard to get down to that but I note that the rate went up by about 8LB per mm.

you can feel the difference working the two sets with the valve spring remover.

you'd look good on a fordson super major! about your style that is!

Taffy
 
nah you'l be ok Taffy you only done for if you read it :D

I'll put it up one more time for you in normal type so you can ignore it or laugh I don't mind which :)

FWIW both Faust and myself have measured oem conicals in a stock head with the stock valves and got similar results that are under those provide to you by a third party.

I found that it was not possible to install the new version of the Taffmeisters DVSK at its required installed length in a stock head with oem valves in order to have a seated pressure lower than the OEM conicals.

If I were in the need for another DVSK I would try the OEM conicals $66 a set.

I'm not attacking you or your business by sharing these results Taffy just sharing, that is all.

fordson major yes I agree they're a nice lil unit, I have a ford 7000, 4.2L engine 4.4 inch bore running schwitzer turbo with 14pounds of boost :twisted:
 
Never really followed up with next part of this story as it was a bit of a downer for me.

I gave the engine a once over with all new bearings and seals, removed CB and rebalanced to .60 balance factor. (Used Tungsten weights but crank was very difficult to machine and I would not do it this way again! used a CNC mill in the end with a carbide slot drill)

Changed to KTM dual valve spring kit as a nearby dealer had a set in stock so I could confirm fitment.

"had" 4 hours of riding on the fresh build, was feeling great actually. must have fluked the B.factor as was so smooth even ok at idle....so was flat out out of a turn in second and heard an almighty mechanical crunch.... the blissful sound of a freewheeling engine with a stationary valve train :(

Did an hour long walk of shame back home to fetch the car and trailer trying to nut out what I had f'kd up during the rebuild. The only job I farmed out was to crimp/press the timing chain together as I don't have the tool so started to assume (well my pride hoped) that they had done a sloppy job and the chain had come apart.

After a quick tear down once home, I found the culprit sitting in the cam lobe "sump" in the top of the head it's the stopper for the auto de-comp swinging lobe. Yep.. one of the red alerts in the owners doc which I forgot about during rebuild.
 

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