Dual Spring Valve Spring Kit

JoeUSA · Aug 30, 2007

I have just received my 2nd Lineaweaver racing Dual Spring Valve Spring Kit.

The kit consists of inner and outer springs, bottom spring shim, and titanium spring retainers for 4 valves. Dale claims the seat pressure is the same and the peak pressure is 1/3 of OEM if I recall correctly. This should definitely increase the rocker arm cam follower bearing and cam lobe life. Max rpm is 10,500+ with OEM valves.

The 1st kit went into my 04 550, the 2nd into my 00 501.

The install process on the 04 required Dale to machine some material off of each valve shim to achieve nominal installed spring height because the engine only had 76 hours on it and had negligible valve recession.

The install on the 00 501 required no machining just 0.040" additional shims (Off the shelf from Racetech), on 3 of the valves and 0.010" on the 4th valve. The 00 has 10,650 miles and 385 hours on it and had broken a valve spring38 hours ago, dropping the valve and leaving me stranded.

The kits were reasonably priced and easy to install. Please disregard the grease on the parts in the attached photo.

Regards,

Joe

Taffy · Aug 30, 2007

favouritism!

hi joe

i got in touch with dale a month ago about this but he said he was too busy at present.

i'm after lash caps, springs, retainers etc etc. i'll also be after the gearbox shims as well.

what about lash caps?

regards

Taffy

JoeUSA · Aug 31, 2007

Re: RE: Dual Spring Valve Spring Kit

Taffy said:
favouritism!

hi joe

i got in touch with dale a month ago about this but he said he was too busy at present.

i'm after lash caps, springs, retainers etc etc. i'll also be after the gearbox shims as well.

what about lash caps?

regards

Taffy

Hi Taffy, how have you been?

No, I'm just very patient. He is very busy. I had my order in and managed to catch him at home.

OEM valves, no lash caps required.

Dale might have lash caps however.

Are you planning on using Titanium valves on a trail bike?

Regards,

Joe

Taffy · Aug 31, 2007

RE: Re: RE: Dual Spring Valve Spring Kit

well if i'm using 37mm inlets and that is on a short strioke 400, yes, it does seem the way to go. but i know that they'll be VERY expensive and i'm not averse to getting on without THIS time.

go into weeds gallery. there, he has a photo of a ti valve from a WR450 and next to it a steel from the 650 husey! that'll shock you. try 12gms v 44gms if i recall.....

regards

Taffy

Taffy · Jan 3, 2008

RE: Re: RE: Dual Spring Valve Spring Kit

well joe i have received a kit perhaps similar to yours.

i have measured everything up tonight and the two sets are as follows when measuring old against new:

ok so we have a common measurement to both:
the tip of the valve and the base of the spring washer.

the kit valve is only 0.5mm proud of the spring cap
cap is 1.9mm thick (added = 2..4mm)
38.7mm for the pair of springs
4.5mm for the base spacer
so that is 45.6mm if no compression to the tip from base of base spacer.

my OEM gear:
valve is 2mm proud of the cap
2mm cap (added = 4mm)
39.7mm spring
1.1mm factory base spacer
so that adds up to 44.8mm between the tip of the valve to the bottom of the base spacer

the difference is .8mm more space for OEM but the kit also has a 0.7mm washer for the spring to sit on that is corrugated to aid slippage.

total difference is 0.1mm as we stand. this winter the head will be off and this stuff fitted so i can isolate it in tests.

installed height for the kit is 29.65 - 29.9mm.

well, now the proof will be in the pudding. i still reckon that shorter cotters are meant to go with this kit so i will try and clarify this but on the kitchen table the husey OEMs appear to be ok!

regards

Taffy

spanner · Jan 3, 2008

RE: Re: RE: Dual Spring Valve Spring Kit

Hi all, can these springs be run with the stock cam or are you using one of Dales special grinds?

Taffy · Jan 3, 2008

RE: Re: RE: Dual Spring Valve Spring Kit

they can be used with anything. they do the job of standard but produce less force at max lift saving power. they also won't break which occasionally the OEM stuff will.

to justify the kit it might be worth doing it for any of the above two reasons or simply because you;'re tuning the engine and as well as making more power you would also like to keep what you have.

regards

Taffy

spanner · Jan 4, 2008

RE: Re: RE: Dual Spring Valve Spring Kit

Thanks Taffy, Is it possible to change valve springs without taking the head off? I have heard it can be done on cars by pumping the cylinder with compressed air to hold the valves closed while compressing the springs. It would be nice to change out the unreliable valve springs before they have a chance to do any damage, that is what I am thinking. How much are these kits worth if that is alright to ask? Cheers, Harvey.

husabutt · Jan 4, 2008

Re: RE: Dual Spring Valve Spring Kit

JoeUSA said:
Taffy said:

favouritism!

hi joe

i got in touch with dale a month ago about this but he said he was too busy at present.

i'm after lash caps, springs, retainers etc etc. i'll also be after the gearbox shims as well.

what about lash caps?

regards

Taffy

Click to expand...

Hi Taffy, how have you been?

No, I'm just very patient. He is very busy. I had my order in and managed to catch him at home.

OEM valves, no lash caps required.

Dale might have lash caps however.

Are you planning on using Titanium valves on a trail bike?

Regards,

Joe

Joe:
Is there an implied disadvantage when using titanium valves on a trail bike?

Taffy · Jan 4, 2008

RE: Re: RE: Dual Spring Valve Spring Kit

spanner

you need to take the head off IMO. it's not that hard honestly! the gasket is normally very good and just comes away from both surfaces freely. you'll lose a bit of coolant and that's all.

the valve spring compressor is the quality tool you'll need, get that right and it's plain sailing. i'll PM you with costs.

regards

Taffy

JoeUSA · Jan 4, 2008

Taffy,

Dale's kit required a nominal outer spring installed height of 1.180" +0.0 - 0.020".

I did not make the measurements you provided.

Husabutt,

Titanium valves wear out much sooner than OEM steel valves and cannot be reground because the seat face of the valve is treated with a thin hard coating that I cannot remember the name of. The titanium used in off shore valves is softer than regular valve material and wears out faster. The coating helps lengthen the valve life. In trail riding one does not need to rev the engine high so valve float is not of concern.

On the other hand, as Taffy points out, the huge intake valves he plans on using if made from steel would weigh lot more than the OEM steel valves and he might not be able to rev his engine high enough because of valve float to take advantage of their increased size. Making them from titanium will probably make them even lighter than the smaller OEM valves, solving the valve float issue.

Regards,

Joe

Taffy · Jan 4, 2008

i think it's nitride coating? i have a set of handmade con rods here for the old duke that i never used.

joe

my measurement of "installed height for the kit is 29.65 - 29.9mm" was off the packet but then the inlet and exhaust are expected to be 35 and 30mm. i will run that and swop to 37/32 in the end i hope.

i know you can measure metric but for other folk out there your measurement is
29.9 plus/minus 0.5mm or 29.4 to 30.4mm for the tick amongst us!

i offer no view other than to say that i would fully expect to go down to 29.4 with the larger inlets.

regards

Taffy

Taffy · Jan 6, 2008

this thread meeds looking at for the whole picture. bsaically, the inlets are now 1.25mm or 0.050" (50 thou) shorter. the collet grooves have kept the same distance from the top of the valve so therefore the valves springs are actually compressed a further 1.25mm/50 thou.

[http://www.husaberg.org/index.php?name=PNphpBB2&file=viewtopic&t=6222 here]

regards

Taffy

Taffy · Jan 18, 2008

[bargain http://cgi.ebay.co.uk/Kibblewhite-Sprin ... dZViewItem] a set with everything you need in it!

regards

Taffy

sparks · Jan 19, 2008

Taffy said:
[bargain http://cgi.ebay.co.uk/Kibblewhite-Sprin ... dZViewItem] a set with everything you need in it!

regards

Taffy[/quote

Loads of springs Taffy but non them of the right kind.

Sparks.

swedishsteel · Jan 19, 2008

sparks said:
Taffy said:

[bargain http://cgi.ebay.co.uk/Kibblewhite-Sprin ... dZViewItem] a set with everything you need in it!

regards

Taffy[/quote

Loads of springs Taffy but non them of the right kind.

Sparks.

Click to expand...

Why is this kit not working? Sparks. is the 450 different?
The link is not working for me. But Kibble have a spring kit thats work http://www.husaberg.org/index.php?name= ... pic&t=7292

Kimbble has 3 kit one to 400 2002, one 450 2002-2005 and one 520 2002, The 400 and 520 kit is identical. and I think its this kit you are going to use in case off differences , Here can you by them cheap http://search.stores.ebay.com/ATVUNLIMI ... 59QQsofpZ0
Im going to try it.

Regards Patrik

sparks · Jan 19, 2008

Hi Patrik,

That link didn't work for me either but when I searched ebay I couldn't find them.
But yes these are the correct one's you require KTM 450 03 06, these are the one's I have.
But I got mine direct from Kibblewhite.

Regards

Sparks.

swedishsteel · Jan 19, 2008

sparks said:
Hi Patrik,

That link didn't work for me either but when I searched ebay I couldn't find them.
But yes these are the correct one's you require KTM 450 03 06, these are the one's I have.
But I got mine direct from Kibblewhite.

Regards

Sparks.

I don't know what the differences it is between the two kit Kibble has, but I think that 450 is little softer than the 400-520kit. because off the Ti-valves of the 450.
And is it the 450 kit you want for a Husa engine?

Regards Patrik

BelgiqueBasterd · Jan 20, 2008

swedishsteel said:
sparks said:

Hi Patrik,

That link didn't work for me either but when I searched ebay I couldn't find them.
But yes these are the correct one's you require KTM 450 03 06, these are the one's I have.
But I got mine direct from Kibblewhite.

Regards

Sparks.

Click to expand...

I don't know what the differences it is between the two kit Kibble has, but I think that 450 is little softer than the 400-520kit. because off the Ti-valves of the 450.
And is it the 450 kit you want for a Husa engine?

Regards Patrik

KTM 450SX are the ones I got in my 2002 650, no problems so far ( only done 300km's tough) springs are a LOT softer than OEM Husa ones.

Taffy · Jan 20, 2008

if you put these words in a UK search of ebay it should find the sale

Kibblewhite Spring Kit for KTM 450, 2002-05

regards

Taffy

Search

Search

Dual Spring Valve Spring Kit

JoeUSA

Attachments

Taffy

JoeUSA

Taffy

Taffy

spanner

Taffy

spanner

husabutt

Taffy

JoeUSA

Taffy

Taffy

Taffy

sparks

swedishsteel

sparks

swedishsteel

BelgiqueBasterd

Taffy

Similar threads

Register CTA

Recent Discussions