Member Contributer chonsey Posted January 15, 2009 Member Contributer Share Posted January 15, 2009 Those would be great on my Aprilia! Quote Link to comment Share on other sites More sharing options...
SEBSPEED Posted January 15, 2009 Share Posted January 15, 2009 Larry, if you ever find the right size belt - would the pulley weigh more than the sprocket? Just curious, I know the belt obviously weighs less than the chain, still and in motion. Quote Link to comment Share on other sites More sharing options...
Veefer800Canuck Posted January 15, 2009 Share Posted January 15, 2009 Last time Mr.RC45 slammed Laguna with authority he was tagged with 103dba sound violation... that's 13dba over the limit... the sound lady came out of booth just a shaking her finger at me like my mom... so I don't think I'll go back for another scolding... and Sac to Miller to Sac is too great a trip... ......unless you find another (quieter) muffler to use for trackdays only. Fab up something that fits right onto your Akrapovic pipe without any mods so it's a straight swapout. You might lose a pony or two, but at least you can ride the track. Quote Link to comment Share on other sites More sharing options...
Member Contributer BusyLittleShop Posted January 15, 2009 Author Member Contributer Share Posted January 15, 2009 Larry, if you ever find the right size belt - would the pulley weigh more than the sprocket? Just curious, I know the belt obviously weighs less than the chain, still and in motion. Here's how it all adds up... I'm most interested is reducing unsprung weight... 17T 525 stock RC45 sprocket 11 oz 40T 525 stock RC45 steel sprocket 1 lb 9 oz 43T 525 modified steel RC45 sprocket 1 lb 3 oz 43T 525 HRC RC45 aluminum sprocket 10 oz 110 links 525 DID VM chain 6 lb 10 oz 108 links 525 DID VM chain 6 lb 7 oz Total stock 17/40 drive system 8 lb 12 oz Total modified 17/43 drive system... 8 lb 11 oz 30T Buell steel sprocket 1 lb 14 oz 72T Buell aluminum sprocket 2 lb 155T Buell Gates 11mm Poly Chain 5 oz Total Drive system 4 lb 3 oz 30T Buell steel sprocket 1 lb 14 oz 76T custom machined 7075 T6 Aluminum sprocket 1 lb 5 oz 172T BMW Conti Sport 11mm Poly Chain 8 oz Total Drive System 3 lb 11 oz Quote Link to comment Share on other sites More sharing options...
Member Contributer BusyLittleShop Posted January 15, 2009 Author Member Contributer Share Posted January 15, 2009 Last time Mr.RC45 slammed Laguna with authority he was tagged with 103dba sound violation... that's 13dba over the limit... the sound lady came out of booth just a shaking her finger at me like my mom... so I don't think I'll go back for another scolding... and Sac to Miller to Sac is too great a trip... ......unless you find another (quieter) muffler to use for trackdays only. Fab up something that fits right onto your Akrapovic pipe without any mods so it's a straight swapout. You might lose a pony or two, but at least you can ride the track. As you know Rob thats easy for me to fab but any extra weight on my $2,800 hand made custom titanium pipes is too risky at race pace... some of you electrical genious out there needs to invent an anti sound system that cancells dba like the Bose system does... Quote Link to comment Share on other sites More sharing options...
Guest 03VFR0078 Posted January 15, 2009 Share Posted January 15, 2009 Last time Mr.RC45 slammed Laguna with authority he was tagged with 103dba sound violation... that's 13dba over the limit... the sound lady came out of booth just a shaking her finger at me like my mom... so I don't think I'll go back for another scolding... and Sac to Miller to Sac is too great a trip... Maybe some db Dawgs (Ignition Racing's db Dawgs Page) and a little... er, throttle control going past the booth would help. I'm gonna try this approach when I take my RC51 to Laguna on 3/18 for the first time. The "stock" exhaust on the Factory Basic Racer is Moriwaki's w/full titanium pipes, so I'm sure it's not gonna pass muster if I don't do something. I'm hoping the db Dawgs will keep me from getting flagged. P.S. The sound limit at Laguna is 92dB. Quote Link to comment Share on other sites More sharing options...
Member Contributer BusyLittleShop Posted January 16, 2009 Author Member Contributer Share Posted January 16, 2009 Last time Mr.RC45 slammed Laguna with authority he was tagged with 103dba sound violation... that's 13dba over the limit... the sound lady came out of booth just a shaking her finger at me like my mom... so I don't think I'll go back for another scolding... and Sac to Miller to Sac is too great a trip... Maybe some db Dawgs (Ignition Racing's db Dawgs Page) and a little... er, throttle control going past the booth would help. I'm gonna try this approach when I take my RC51 to Laguna on 3/18 for the first time. The "stock" exhaust on the Factory Basic Racer is Moriwaki's w/full titanium pipes, so I'm sure it's not gonna pass muster if I don't do something. I'm hoping the db Dawgs will keep me from getting flagged. P.S. The sound limit at Laguna is 92dB. Throttle control worked to get me by as I was a corner worker for Kieth Code's Superbike school but now I undertand they have a roving sound meter... your dead... I think the DB dawg will help but I've been commisioned by another track day instuctor to improved upon it... Thanks for the correction of the limit... I picked 90dba and stamped that into my homemade end cap to get pass tech... it worked since they don't know a thing about an RC45... RC51 yes... 90 dba end cap I even made an 80dba end cap... can you hear the difference??? Quote Link to comment Share on other sites More sharing options...
Guest vfroem Posted February 28, 2009 Share Posted February 28, 2009 I did not find RC45 CMC rotors on the braketech website. Are they mentioned as 'RC45' or do the rotors of another bike fit. (the weight reduction does really sounds good to me....) Quote Link to comment Share on other sites More sharing options...
Guest smithyrc30 Posted April 7, 2009 Share Posted April 7, 2009 Nice work. Just a quick question, you have your Magnesium caliper hangers bolted onto the Aluminum fork lowers. What gasket or sealing material did you use to prevent the Magnesium disolving? Magnesium is the least 'noble' of all the metals and in conjunction with Aluminum and water produces a very effective ~ 1 volt battery. Problem is the Magnesium tends to get consumed in the process. You don't need much water, just washing the bike or a small puddle will be enought to set it off. Machined surfaces are generally the worst because they are clean and free of corrossion. They also tend to have high clamp loads holding the parts together. Interested because I have some Magnesium fork lowers for the 45, and haven't used them yet because I can't get the gaskets for the calipers. I could make some, but I don't know what they look like..... Cheers Quote Link to comment Share on other sites More sharing options...
Lee 2002 Posted April 7, 2009 Share Posted April 7, 2009 (edited) What gasket or sealing material did you use to prevent the Magnesium disolving? I don't know if/what Larry used in this project. But Alodine should slow down the process you are talking about. I don't think that there is anything that can stop (bare) Magnesium electrolosis, especially in the environments motorcycles are exposed to. http://www.magnesium-elektron.com/data/dow...ds/DS256SU0.PDF Edited April 7, 2009 by Lee 2002 Quote Link to comment Share on other sites More sharing options...
Member Contributer BusyLittleShop Posted April 8, 2009 Author Member Contributer Share Posted April 8, 2009 Nice work.Just a quick question, you have your Magnesium caliper hangers bolted onto the Aluminum fork lowers. What gasket or sealing material did you use to prevent the Magnesium disolving? Magnesium is the least 'noble' of all the metals and in conjunction with Aluminum and water produces a very effective ~ 1 volt battery. Problem is the Magnesium tends to get consumed in the process. You don't need much water, just washing the bike or a small puddle will be enought to set it off. Machined surfaces are generally the worst because they are clean and free of corrossion. They also tend to have high clamp loads holding the parts together. Interested because I have some Magnesium fork lowers for the 45, and haven't used them yet because I can't get the gaskets for the calipers. I could make some, but I don't know what they look like..... Cheers Thanks Smithy... I'm not using any material in between the magnesium and aluminum and after 20 years using the stuff I have never experienced the dissolving you warn about ... then again I don't hit my prize with a garden hose or ride in the wet... at least I try my damndest not to... My unprotected magnesium caliper hangers started out nice and shiny but after a year on the perverted highway they are a dull gray... the machined mating surfaces show 0.0 dissolving... I don't think of magnesium as being any less "noble" than aluminum... instead I think of it as the little known "metal of motion"... and it deserves to be understood more... As the lightest of all common structural metals magnesium naturally began it's start as a major player in the field of aeronautics... born with the continuing need for aircraft of increased range... load... speed... maneuverability and climb... Magnesium found it's way into motorcycles where the resultant need of reducing weight to an absolute minimum is paramount... Dow Chemical is the largest and oldest producer of magnesium... having pioneered and produced the "metal of motion" since 1916... extracting it from Michigan brine and recently from salt water as well... Because of this experience... Dow has been able to enlarge the abundance of supply to more than keep pace with ever broadening scope of this key metal's usefulness... Dowmetal is the trade name for Dow magnesium alloys... magnesium is not only a third lighter than aluminum but it has exceptional strength and elastic energy absorption qualities... If you need to know if a big shinny block of metal is magnesium or aluminum... tap it with a hammer... magnesium sounds dead whereas aluminum will ring... If you need to know if a small piece of metal is magnesium or not... apply white vinegar directly to exposed bare metal... if it fizzes it's safe to say magnesium... if it doesn't it can be any other metal in the world... Obviously the combination of weight and strength is a prime consideration in the engineering and construction of magnesium motorcycle parts... but magnesium also has valuable advantages in manual and portable tools... in the reciprocating parts of machinery... in all areas where inertia... power consumption and speed are involved... Magnesium is easily machined... often at a substantial saving of cost... it lends itself to a wide variety of fabrication techniques... sand... permanent mold and die casting... (note Marchesini wheels are all sand cast)... it may be forged... extruded... formed... riveted... and gas welded... Magnesium is offered in a comprehensive range of alloys... all poured in both in ingot and fabricated forms... Weight??? third lighter than aluminum... Strength to weight ratio??? highest among common structural metals... Fatigue strength??? good... High temp operation??? Strength decreases and ductility increases with increase in temperatures... Not recommended for use above 400F... Low temp operation??? Strength increases and ductility decreases with decrease in temp... Resistance to weather exposure??? good in rural or inland atmospheres... color will change to dark gray if unprotected... parts need to be treated in Dow 7 giving magnesium the characteristic chocolate brown color so many motorcycle parts are painted to resemble... Resistance to salty atmosphere??? Satisfactory is many cases if suitable Dow 7 protection is given... Dow #7 is dichromate treatment that the company no longer supports but you may try this site for support... http://www.finishing.com/Shops/anacote.html Resistance to alkalis??? Generally good... again if Dow 7 is employed... Resistance to acids... salts... brines??? not generally good... Resistance to organic chemicals such as oils... fats... alcohol??? generally good... again Dow 7 is recommended... Resistance to tarnish??? Buffed and polished surfaces can be protected with clear lacquer... Heat treating??? Castings... forging and extrusions can be heat treated to improve properties... Machining??? easiest of all metals to cut... carbide insert bits produce very clean cuts... Grinding and polishing??? Very easily done... no dragging occurs... Scrap recovery??? All clean scrap... except grinding dust... can be recovered economically... Blanking and shearing??? Same as for other metals on thin sheet... thick sections should be heated to 500F first... Pressing and drawing??? Deep draws are performed hot in a single operation... Bending??? Can be done cold when bend radii are liberal and deformation is moderate... otherwise hot forming at 500-750F is required... Riveting??? Best method of joining parts... Welding??? Magnesium alloys can be joined by gas... TIG... electric resistance spot... seam or butt welding... Soldering??? useful for building up magnesium alloy on patterns or for minor repairs on castings... Plating??? There are methods for nickel and chromium plating... most parts are Dow 7... Painting??? Decorative finishes are applied in any of the wide variety of novelty colors available on the market... Quote Link to comment Share on other sites More sharing options...
SLO97VFR Posted April 9, 2009 Share Posted April 9, 2009 Just dont catch it on fire whatever you do...... Quote Link to comment Share on other sites More sharing options...
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