s4r engine rebuilt need help!!!

[SpikeC]

 Ok, let me get this straight, you bent a valve and then straightened it. Is that right? If so, dude, that motor is going to blow up. The head will break off of the valve and punch a hole in the piston.

[Metzis]

The work has been done by a professional, the seal perfectly and as he told me it was just a little bented less than few degrees, so i don't think there will be a problem with the valve the thing i am worrying about is the closer clearance and how quickly they can cause a problem if they are off by a tenth of a mm...

[brad black]

i see lots of bikes with 0.25, even up to 0.35 or so.

[Metzis]

after all the problems and everything i adjust the clearance of the closer to around 0.1 mm and today we made a custom map eventually for my monster.... The results 117 whp and 11 kg.m  torque... Quite good for now... But i have still some thoughts to use the cams from the 916 sp i have... Not sure yet!!! As i said for now i am pleased so i will stick at this stage for a while.... I mod i am thinking is to make a custom ram air because i noticed big difference to the the power curve from the bike while was around 70 degrees celsius and over 85... Fresh cool air right in the intake i think will help... What is your opinion about that mod?

[koko64]

That's good power for 916cc
Maybe ask Brad and Speeddog about intake mods for this model. Does the bike have an open airbox?

[Metzis]

The bike is 996 :/

[koko64]

Forgot. Its an S4R! Still good.
Open airbox?

[Metzis]

Yeah i have the airbox cutted but i am not sure if that's enough for the engine to produce the best out of it... But of course i am not an expert or anything that's why i am asking because i don't want to throw away any more money just for experimenting with the bike...

[cross]

It seems like you are building a nice engine.
Valves are too cheap to have bent ones straitened, it's too much of a risk!

[Metzis]

Yeah i know if the guy from the workshop didn't ensure me that i wouldn't have any problem for sure i would buy new ones but i have done more than 2000 klm since then and still no problem "lets cross our fingers it will stay that way"

[Metzis]

i have an another question for Brad Brad do you know how many degrees should i retard intake and exhaust 916 sp cams so i won't have clearance issues between valves and piston? !5.000 km service is coming and i am thinking to try them....

[koko64]

Maybe you should pm him to be sure.

[brad black]

i have an another question for Brad Brad do you know how many degrees should i retard intake and exhaust 916 sp cams so i won't have clearance issues between valves and piston? !5.000 km service is coming and i am thinking to try them....

you retard the inlet and advance the exhaust.  10 to 15 degrees on each at a guess.

it'll really run like shit then.

[Metzis]

I understand the reason it's too much... Do you think that i could send them over for reprofile ? Do you think it's possible for an expert to make this specific cam with less duration, so i wont have any clearance issues....

[Metzis]

Sorry for all those questions but i want to make some more out of it with the things i have, i tried to sell these cams so i can afford to buy  ferracci or v2 cams but with no hope....