Cainsville did not work out the flooding was the worse since 1912 so we cut the trip short at Grand Junction CO the bike got hard to start after 3 more days,Monday morning,tight intakes i'm sure! will get into her and let you know what I find,This seems to be about the same time on the bike as I have ever gotten out of a valve adustment on a 450 just to refresh we have 2 05's and had an 02 since the TRX intakes did not lastany longer than the ti valves and the input from others haveing bad experience I will more than likely replace with the stock valves or go to the Kibble white set up not sure yet but will keep ya posted,KennyOH by the way the dealer did not install just cut the seats
Using TRX450 ATV valves in a CRF450
- Thread starter Rich Rohrich
- Start date
checked out the link feel kinda stupid about my credential comment after reading some of the stuff on your experiance.I called service honda today and ordered a piston, rings,and the stock ti valves for the hard starting crf 450 felt freshining it up is a good Idea when I get in there I will let you know what I find I feel like it is a bargain to get all the parts for 230.00 and knot having tofix a trashed motor.I'll never know if she would have come apart after a valve shim for I will put in the new stock parts since the TRX valves did not give me any extra longivety,and all the input from yourself and others I think the turning point in my mind was the comment about the dirt trackers not useing the TRX valves anymore, me being an old tt flat track guy.My kid is bummed wants to go ride sandwash this weekend yet his parts will not get here till next week. Service HONDA had me do a quick survey with this order one question was why use them my answer PRICE at 8.5% sales tax rate the shipping is always less than the tax would be let alone the discount.MY local dealer asked why I buy bikes put not anything else from them and I told them discount the stuff and I will buy.I know they have to make a liveing but retail is rediculious when the the internet offers good deals and service.Haveing to support me and my kids rideing habit and liveing in a ski town I need to be contios of the net cost of things.Like the ski pass if you use it alot the net cost to ski per time is cheep.Oh well I'm goin on an on life is good! Kenny
- Thread starter
- #29
hamilcrf said:
Don't worry about it, I've been around long enough to have developed a pretty thick skin. ;)
I'm glad you got off cheap just wearing out the TRX valves and not hurting the engine.
If you are going to use the CRF OEM parts, you can get a little better valve life out of them by adding a .015" spring shim under the base washers on the intakes. It tightens up the installed height a bit and adds a few pounds of seat pressure, but not so much as to cause problems. It seems to help some of the seat bounce issues at high rpm.
OK so I finaly had the time to take a look at this bike.the intakes tight.riped her apart doing the top end my son ran 5 gal.pre mix in this bike at one point so it was pretty dirty on top of piston lots of carbon build up.any way no sighn the piston ever contacted the intake valves as best as could tell the fly cuts in the piston were as dirty as the rest.Put new stock piston,rings and titanium intake valves. was told buy an old yamaha tec to clean the cylinder with muratic acid since no one has a diamond hone.seemed to do a real nice job.did this on my 02 crf and had no problems have you heard of doing this whats your take on it,and the use of a ball stone hone vrs diamond hone.was told the stone hone won't work on nicasil Buy the way bike runs great and I feel better not haveing to wory about the motor comming apart from the heavy TRX intakes,Thanks,Kenny
- Thread starter
- #31
A multi-shoe Sunnen diamond hone is by far the best way to do it, but finding a shop that has one along with an operator who actually knows what he is doing on a plated bore is pretty tough. A 320 grit BRM flexhone the same size as the bore will do a good job of cleaning/deglazing the bore and allow the new rings to seal properly. Plus it's affordable enough for the average guy to have one in his toolbox.
