Got a ?

[1slow01Z71]

I have an 01 Honda CBR F4i and lately the trans shifting has gotten worse and worse. Mainly the 1-2 shift. If I get on it hard through first and let out at say 55mph and try and shift on up to 5th when I shift into 2nd it is nasty crunch noise the other gears it goes ahead and pops on into gear easily. This is my first bike and I know nothing really about them. I assume that the kind of crunch Im getting is from some f-ed synchros from lots of hard riding. Am I correct? Its just not a smooth shift anymore it kind of feels like in a manual car when you dont have the clutch pushed all the way in and try and shift it how it grinds and shakes thats basically what this does. I have adjusted the clutch cable to pull it in as far as it will go but no dice still the same. Time to rebuild the trans? How hard is it? I have built a motor but no trans work. Anybody have a clue how much Im looking at spending?

Thanks, Cody

[Biff85ta]

Sounds bad you should give the bike to me.:wink:

Sounds like you are on the right track but you are going to have to tear into it before you know what is wrong exactly. I have been doing a ton of reading here lately and it seems second gear is a common problem on a lot of bikes.

[Biff85ta]

Moved this to the right forum so I could feel important.

[1slow01Z71]

I put it in the lounge cause the tech part said making it faster I just want my bike to work:rrofl:

[Damian]

Might try something as simple as using a thinner oil. I remember one time I used a thick racing oil in my R1 and it shifted like shit, almost like the tranny was going out. Went back to a thinner 5w50 and all the problems went away. Start there....

[Biff85ta]

Might try something as simple as using a thinner oil. I remember one time I used a thick racing oil in my R1 and it shifted like shit, almost like the tranny was going out. Went back to a thinner 5w50 and all the problems went away. Start there....


See you got an answer.:drama: :rrofl:

[1slow01Z71]

See you got an answer.:drama: :rrofl:
:finger: :D

Thanks Damian Ill try that before I pull the trans out and go through all that shit.

[silver-mod-o]

you shouldnt be afraid to pull that trans all to pieces after building that motor of yours... I can build an HD tranny with my eyes closed these days... I have just had it apart so many times its not even funny. from what it sounds like, you have worn the clutch friction material down quite a bit and are in need of a new one. if you have already adjusted the cable all the way out and tried it then I would say thats what it is. While you have it apart inspect the syncros very well.. I have heard of more than one honda tranny having those issues after being ridden hard for a while but they sell hardened syncros too so it wouldnt be a big deal to upgrade... you can try the iol out first just to eliminate the obvious shit first but I kind of ave a feeling its clutch or syncro related... hope I can help you out with this since you offered to help me so much with the truck... this is kinda my dept....