Morgan Posted June 4, 2012 Author Share Posted June 4, 2012 Install your head assembly with the motor on TDC and install the cam gear and cam chain with the lines level with the arrows on the cam tower. Install the cam gear bolts and the timing chain tensioner, extend the tensioner to ensure it doesn't skip timing when you roll it over. With your 8mm allen you used eariler, roll the motor over slowly 2-3 full rotations. Remove the head in the opposite order you installed it, and we are now ready to see what we have for Piston to Valve clearance. When the head is removed you will be able to see that the valves have left their indentions in the modeling clay. Take note of the outer edge to make sure the valves are inside the valve pockets and not hitting. Next, cut the clay in half from intake to exhaust not from intake to intake. Dished valves must be checked against the lowest point at the rear of the valve relief. The center will give you a false reading. Take your calipers and measure the piece that is still on the piston and record. The absolute bare minimum is .050 on the intake and .070 on the exhaust. With this DASA LL piston our intake was .075 and the exhaust was at .096, adequate room on both sides, with slightly more to allow for even more to be cut off the head safely then we already cut off. Wiseco and JE shelf pistons usually do not have the valve relief that CP shelf pistons do. Most CP shelf piston will allow .010-.015 off the cylinder and .015-.020 off the head with adequate piston to valve clearance. Quote Morgan Russell Demon Industries- Owner Facebook- Demon Industries Link to comment Share on other sites More sharing options...
Morgan Posted June 4, 2012 Author Share Posted June 4, 2012 Try to get the cam info up sometime this week. 2 Quote Morgan Russell Demon Industries- Owner Facebook- Demon Industries Link to comment Share on other sites More sharing options...
bigcountrydude Posted June 4, 2012 Share Posted June 4, 2012 lol "secrets". great rightups. after what modifcations would you say you HAVE to check the the deck height? just before and after decking, and with long rod strokers? Quote Stock Bore, Stock Stroke, Pump Gas, and Kicking Ass TEAM JUNK RACING #224 Link to comment Share on other sites More sharing options...
OTMTRX Posted June 4, 2012 Share Posted June 4, 2012 Good on you Morgan! Quote Link to comment Share on other sites More sharing options...
ghott Posted June 4, 2012 Share Posted June 4, 2012 Fantastic write-up, can't wait for more! Quote Gary My 2005 Honda TRX450R Site (^^^TRX450R tech articles, dyno testing, pics, vids, and more) http://450rhq.com/forum/data/MetaMirrorCache/993866a3d66db74390c422c8723b1a16.jpg | '04 Racers Edge, AZ 545cc "Me Gusta!"|||| '05 Wicked Motors, MD 450cc "PunisheR" | Link to comment Share on other sites More sharing options...
Dr. Beardface Posted June 4, 2012 Share Posted June 4, 2012 Great stuff! Couple of questions if you don't mind. Do you stick with .040 on all your engines or does it vary by manufacturer/engine size? How much of an effect does this have on compression ratio, is the whole point of this to increase compression? What is the stock deck height set at? Quote 2004 TRX480R 30+ HP Link to comment Share on other sites More sharing options...
mx333 Posted June 5, 2012 Share Posted June 5, 2012 Great Info there. Quote Link to comment Share on other sites More sharing options...
TRX450Ryan Posted June 5, 2012 Share Posted June 5, 2012 Hey morg, after removing .010-0.015 from the cylinder, is it enough to worrry about it affecting the cam timing, and to degree it, or is it minimal at that amount of material removed? Quote 2004 Trx480R Motowoz shocks and quad innovations arms Rage Head, 12.5.1 Comp 480, Rossier Pipe, Dyna IGN And countless other things over the years, 1995 Ranger, 6'' lift on 35's awaiting the transplant of a 400'' SBC Link to comment Share on other sites More sharing options...
Wadezzz Posted September 4, 2012 Share Posted September 4, 2012 great thread very informative !!! i love reading stuff like this ! thanks Quote 2005 TRX450R MODS : esr exhaust, hot cams stg II cam, esr airbox eliminator. More coming this winter..... stay tuned Link to comment Share on other sites More sharing options...
450R Posted September 6, 2012 Share Posted September 6, 2012 I wish Morgan would come on and finish this thread... this is one of the best threads on building I've ever come across. The secrets of doing a top end like a pro. Quote Link to comment Share on other sites More sharing options...
Wadezzz Posted September 6, 2012 Share Posted September 6, 2012 I was thinking the same thing ! o well mans prob only got so much time ya know Quote 2005 TRX450R MODS : esr exhaust, hot cams stg II cam, esr airbox eliminator. More coming this winter..... stay tuned Link to comment Share on other sites More sharing options...
chronicsmoke Posted May 15, 2013 Share Posted May 15, 2013 Bump for a very informative thread. Anything else to add!? :popcorn: Quote CRASHTEST RACING IMMORTAL ATV http://www.offtopic.forum/data/MetaMirrorCache/7cbc5acb2a1ab76eac286e7fe5b4520d.jpg Link to comment Share on other sites More sharing options...
rexxtack Posted May 16, 2013 Share Posted May 16, 2013 Great write up.. Ill be staying tuned to learn more. Quote Link to comment Share on other sites More sharing options...
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