Raptor Forum banner

1 - 14 of 14 Posts

·
Registered
Joined
·
71 Posts
Discussion Starter #1
MY RAPTOR STARTED TO MAKE A STRANGE SOUND THE WEEKEND. WHEN IN THIRD GEAR OR HIGHER AND YOU DECELLERATE IT MAKES A SOUND LIKE A CAN OF MARBLES BEING SHAKEN. THE SOUND COMES FROM THE TOP OF THE MOTOR. THE BIKE HAS ABOUT 4 HOURS OF RIDING ON IT SINCE THE VALVES WERE PROFESSIONALLY ADJUSTED. THERE WAS NO LOSS OF POWER ASSOCIATED WITH THE SOUND. ANYBODY GOT ANY IDEAS. THE DEALER SAID THEY HAVE NEVER HEARD OF A SOUND LIKE THAT BEFORE.
P.S. THE MAIN RELAY AFTER THE BATTERY SMOKED AT THE SAME TIME NOW THE BIKE IS TOTALLY DEAD
 

·
Registered
Joined
·
841 Posts
Usually when you hear sounds like that comin from the top of the motor its either the valves or the cct (cam chain tensioner).....Ive had a few Honda motors (streetbikes) that Ive had to replace them with manual ones......my guess would be the valves wernt adjusted right
 

·
Registered
Joined
·
78 Posts
StuntPunkJames said:
Usually when you hear sounds like that comin from the top of the motor its either the valves or the cct (cam chain tensioner).....Ive had a few Honda motors (streetbikes) that Ive had to replace them with manual ones......my guess would be the valves wernt adjusted right
totally agree with SPJ
 

·
Registered
Joined
·
71 Posts
Discussion Starter #4
I was also thinking that is was a valve problem too. the place that adjusted the valves was an independant shop not a dealer but I gave then the valve clearance page out of the repair manual. they are a dynojet dyno shop and I was having the bike dynoed at the same time thats why I had them do the valves. The bike seemed less powerful after they tuned it but it made 74 horse on the dyno
 

·
Registered
Joined
·
71 Posts
Discussion Starter #6
I immediatly dropped the bike off at the dealership and just told them to go through the whole bike and repair any problems they find (my friend ownes the dealership so their trustworthy)
 

·
Premium Member
Joined
·
601 Posts
you got 74 horses with just a Trinity stage iv kit or do you have something else.
 

·
Registered
Joined
·
71 Posts
Discussion Starter #8
no, lots of head work, and a different compression piston kit, bigger injector and 116 race fuel, and when I bought the bike i bought it from my friends dealership and he and his mechanic said that this one bike seemed unnaturally fast right out of the box on thier test runs. you know what they say motors run thier best right before they blow up.
 

·
Registered
Joined
·
2,446 Posts
I agree that you should be able to just start and go. I think the problem you will run into is if you just start go and then shut it off right away, then repeat. The engine will not warm up enough to burn off the carbon deposit on the plug and even in a car you will foul a plug. If you are going to start it run it until it is warm before you shut it off and you should be fine. All of this would of course depend on how your bike is tuned, if you are on the rich side you will have more carbon deposit buildup.
 

·
Registered
Joined
·
71 Posts
Discussion Starter #10
totally right, i was assuming that whenever he starts it he is taking out for a ride isint this conversation from a differant post?
 

·
Premium Member
Joined
·
5,119 Posts
BUZZ700R said:
no, lots of head work, and a different compression piston kit, bigger injector and 116 race fuel, and when I bought the bike i bought it from my friends dealership and he and his mechanic said that this one bike seemed unnaturally fast right out of the box on thier test runs. you know what they say motors run thier best right before they blow up.
What brand is it and where did you get the "bigger injector" ? This info would be real helpful to me :thumbsup:

So your still stock bore & stroke?
 

·
Registered
Joined
·
71 Posts
Discussion Starter #12
Yest I am still stock bore and stroke just differant dome size to increase compression, the bigger injector is actually from a subaru wrx sti I build performance cars for a living and have oem parts laying around and I just experimented till one worked, then took it to the dyno and tuned it. I'll tell you what with the trinity computer the ability to change not just amount of fuel but when it is applied is just like mapping a real car, but I am thinking of switching to the unit by dynojet because it is USB enabled so i believe that i can use my computer to actually view graphs of what im doing and not need to be on the dyno to tune accuratly
 

·
Premium Member
Joined
·
5,119 Posts
Thanks, I have the PCIII USB and it is far more sophisicated then the Dobeck mfg.gen III controller that they make for Trinity. The dyno is still the quickest way to get it dialed in though, once your there you can forget it and just ride it like you stole it. The only time you need to adjust the fuel curve is if you make more radical mods, then it's just some quick touch up tuning. :thumbsup:


What kind of Dyno are you using? 74 Horse is what you would see out of a 105 bore, 4mil stroke cammed & ported with 12.1 comp thats well tuned. Congrates you have done something that not even the top builders in the country have with a stock bore and stroke 700R engine . That's got to be a record ;) :thumbsup:
 

·
Registered
Joined
·
71 Posts
Discussion Starter #14
I got it duned by a place here in MI called lakes powersports they use a dynojet dyno. I'm just going by the numbers on the dyno sheet they gave me they probably have a happy dyno but its still cool to be able to hand someone printouts and say thats my bike. bike and quad dynos are rare around here (according to dynojet theres only about 5 in the state and most are not publicaly available so its kinda hard to have someone else check it.
 
1 - 14 of 14 Posts
Top