ive got an mc28 engine in my mc21 and for some reason its running really bad
the engine came complete !
so do i need to put anything from the mc21 engine on it
electric wise i meen like stator or something
eyrey1 wrote:i found that after id posted this
so did you run yours with the 28 flywheel of change to the 21 ?
ive still got the complete 21 se engine
Yeah I changed the flywheel. It's actually really easy to change (using the correct tools and techniques!) so is a must do really. It will run poorly without the change, and could cause damage. The alternative is to change the timing, which is discussed in these forums too.
Is the engine the only MC28 part? Still using the 21 airbox, carbs etc? Any known modifications to the engine itself?
It's also worth checking to make sure the powervalves are clean, adjusted correctly and operate smoothly.
engine is std i think ! i got it from gecko and i dont think dan knew if it was a mc21 or a 28
it just had no power when i rode it ,really flat , and i started to run very bad and only just got me home
it wouldnt rev at all , just so numb when you try'd to rev it !
it just got worse and worse im a bit pissed off with it at the minute
i might end up just rebuild the other motor and put that back in ! but after £1100 i wouldnt mind using this one lol
ive got most of the 250's or had them in the past and never had one running like this ,not even when one had siezed and managed to limp home !
eyrey1 wrote:
i might end up just rebuild the other motor and put that back in ! but after £1100 i wouldnt mind using this one lol
A bit after-the-fact, I'm afraid, but it would've cost less than that to have us rebuild yours!*
*Unless, of course, your crank had failed.
the bearings were a bit worn andy and it needed a re-build i think
its not a big thing getting the crank re-built ive got 5 sets of crank bearings .
been better if i would of had them when i first needed them lol
Andrew , your not charging enough, you could be making far more than 300 pound for a rebuilt crank, I had to pay over 2000 oz dollars for a brand new one.
brizfox wrote:Andrew , your not charging enough, you could be making far more than 300 pound for a rebuilt crank, I had to pay over 2000 oz dollars for a brand new one.
Over $2000! Did that include fitting? I bought a brand new one from my local Honda dealer in Melbourne at the start of the year for $990. I did have to wait two weeks for it to arrive.
I can't recommend them but I used SEP Kegworth for a full crank rebuild for £220. You can make your own mind up if you think they are good enough. Same as for the aftermarket fairings do your own research
ive got a pal that does them in his shed phil .
hes been doing them for about 40 years now for the race lads and himself plus a few shops
mostly tz's and lc's and the like ,he has got my kr1s crank at the minute
he does them for next to nowt compared to the prices mentioned on here
but its like everything it's who you know !
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