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Thread: 04 450 SMR Head Question (bronze guides)

  1. #11
    Lifetime Team KTMTalk caflash's Avatar
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    Default Re: 04 450 SMR Head Question (bronze guides)

    Quote Originally Posted by WelderShane View Post
    Thanks alot DJH, and Caflash. I really appreciate the answers and help for everything about this topic.
    you are welcome.
    Rfs DocBob

    Current: rebuilt 560 smr motor:shipped
    520 to 613.p

    ALL rfs engines available....other than 250ís


    2004 613 rfs titled
    2002 520 rfs titled
    2005 483 rfs titled
    1996 620 lc4 titled
    (2)2007 613's in the works

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  3. #12
    KTMTalk Member wiseguy18's Avatar
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    Default Re: 04 450 SMR Head Question (bronze guides)

    Quote Originally Posted by caflash View Post
    100% failure rate. 50 hours. Damages the valves edges wobbling in the guide as the valve hits the seat at an off angle.

    Ti valves are not regrindable. Replace only.

    I have ti heads with iron updated guides and good ti valves in stock.

    Replacing the lighter valves requires heavier springs to go with the heavier valves. Looses power.

    If you kick start your bike and stop mid kick your kick starter lever stays where it was.

    With the heavier tension springs to match the heavier valves the kick lever will push your leg back up as the heavier valve springs turn the cam backwards.

    stop riding the bike. Avoid more valve damage. Needs to come apart and see how bad the wear is.

    Or ride it till it has a failure. Part it out then.

    Have a leakdown test done. Normal is a rod kit, cylinder replate, piston and fix head. If the rod is tight and the piston and cylinder are ok then itís just the head issues.

    Guides and ti valves are in the fiche here above. Plus install of course.
    Caflash, I see you all over this site. New member here, new supermoto rider. Recently picked up an 05' 450 SMR with "10" hours on it according to previous owner. It looks immaculate, but who knows. I'm well aware of the valve guide issue and have read yours and DJH's explanations of the conflicting valve/guide materials many times (thanks).

    Before this thing blows up, what is the most cost effective thing to do for me to ride Supermoto? Install iron guides from an 06' and keep the Ti valves? Where can I get iron guides or is DJH still doing head rebuilds? Seems his website is down.

    Sorry for any ignorance. Thanks in advance!

  4. #13
    KTMTalk Member DJH's Avatar
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    Default Re: 04 450 SMR Head Question (bronze guides)

    I decided I could run a web site or do engines but not both, email is djhktm@gmail.com
    [URL=http://www.djhcyclesport.com
    Former Husky Dealer in the '70's, currently Sell Real Estate, Seattle area and as a hobby business I manufactor cam chain tensioners for the KTMs, do Carburetor modification & setup and valve work on KTM & Husky 4 strokes. Full stock of parts for the KTM's. My rides are; Cadillac Escalade (the 1/2 pickup version), 72 ElCamino 454SS, and Triumph 1050 Sprint ST, Iron Butt member

  5. #14
    Lifetime Team KTMTalk caflash's Avatar
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    Default Re: 04 450 SMR Head Question (bronze guides)

    I have a good stock of oem ti valved heads here. Rebuilt. Ported. Chamber done. Price is determined my your heads condition. If your bronze guides are still good and the valves are good then I can reuse your head for non ti valve uses. A core.

    your valve springs are not strong enough for heavier valves. So the two parts need to stay together.

    not a problem. Outright I can sell you a iron guided fixed, ported ti valve head regardless of yours condition.

    i have learned not to trust tiny hour reports. Maybe...

    if you want to send your head I have the replacement fixed.

    Need to see what yours condition really is.

    Noticeable difference in performance to sub heavier valves and stronger springs versus retain the ti stuff.

    on any new purchase run a leakdown test just to see how tight the top end is now.
    Rfs DocBob

    Current: rebuilt 560 smr motor:shipped
    520 to 613.p

    ALL rfs engines available....other than 250ís


    2004 613 rfs titled
    2002 520 rfs titled
    2005 483 rfs titled
    1996 620 lc4 titled
    (2)2007 613's in the works

  6. #15
    KTMTalk Member Folie's Avatar
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    Default Re: 04 450 SMR Head Question (bronze guides)

    If you doubt what you have put a magnet to it. The OEM valves are magnetic. I've never dealt with titanium valves but titanium is absolutely non magnetic. The other option is that they are aftermarket. Kibblewhite is used a lot. I have a set somewhere. I can check tomorrow if you want.

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