84 1100 Rebuild Time

[Dads_FJ]

"A 1000 japenese engineers designed the FJ1100 motor."

Isn't the "Japanese engineered" carbureted 1999-2007 XJR1300 the same mill?  If so, we're not doing anything different than the Yamaha engineers by increasing displacement.


http://www.motorcycle-usa.com/2014/10/article/2015-yamaha-xjr1300-first-look/

"...The XJR1300 got its first life when Yamaha bored-out its old 1188cc air-cooled Inline Four to 1250cc for the 1999 model year and it's been going strong ever since. In 2007 Yamaha added fuel injection and throughout the years the Tuning Fork brand has tweaked here and there to meet emissions standards, but for the most part the powerplant has remained unchanged."

[jscgdunn]

hmmmm..."skier..." created his account March 13, 2017, 01:22:01 PM.  First post is pretty nasty.  Did we not ban a guy like this a while back who then created another account and then proceeded to insult everyone, until that account was banned as well?  Just sayin'

[fj1289]

A 1000 japenese engineers designed the FJ1100 motor. One mechanic with a big bore kit can fuck up how your engine runs.
Sure you might get more power but overall the tourque and powerband curves for big bores are not the same as factory.
U may have more power but a fucked up tourque band and weird running bike.
Its your engine though so have at it.

LOL!

A big bore by itself will usually improve your torque curve!

[simi_ed]

I didn't come here for an argument...

[Flynt]

I didn't come here for an argument...

Me neither...  to each his own ring a bell anyone?

calling out the big blocks can be hazardous to your riding safety however...   

Frank

[yamaha fj rider]

A 1000 japenese engineers designed the FJ1100 motor.

I doubt there are 1,000 engineers working for all of Yamaha.

Fred said "I can't post a question about requiring, new members to pass an IQ test before joining the forum". So I am not posting this as a question, just passing along what I was told.

Kurt

[Mike Ramos]

Holy Toledo!

Hmmm, let's see.... there is Brutus I've seen down in Tennessee, the Wizard down in the San Jose area, Mr. Conlon down in southern California, another California southerner from Semi Valley, Fred from Kansas, apparently some fellows from down under and of course the Giant Killer from somewhere up north....

And no doubt a host of others who got it all wrong...?!

May I suggest that CutterBill has it right... there is no argument!!!

[Pat Conlon]

We have heard this opinion before on our FJ forum. Something along the lines of "Yamaha's got it right, why mess with it? Why modify anything? 17" rims and modern radial tires will fuck up the handling of the bike...etc, etc.."
Ad Naseum.

While several specifics of skiier's post are inaccurate, I noted that he used "you might" and "you may" in his statements....He did not say "you will" an important distinction.

I do agree with him on a couple of points.
1) slapping on a big block without knowing what you're doing will end poorly. About like a monkey with a machine gun. (not you Marcus)
2) compressing the added volume of displacement into the same squish area will result in a higher compression, yep, that's true. You've got to have a plan to address that, especially if you're running Kalif. piss water pump gas.
3) if you are pulling more air into the motor, you must address the airflow...i.e. add more fuel. Proper Jetting is critical.(not the slides skiier, the jets)
4) power and torque will not be the same as factory. Yep, that is true.
5) you might have more power, but end up with a fucked up torque curve and a weird running bike...
Very true. With the improper selection of cams, you can have a bike that howls at the track, yet runs like shit on the street.

Skiier's overall premise that "you can't go wrong if you stay with stock specifications"
Boring, but true. Kind of like ordering vanilla ice cream when you can have Cherry Garcia.

That said, I sure enjoy that RPM 1380cc engine, fucked up torque curve and all.
A man's got to know his limitations....and some thing's are best left to professionals.

Sincerely

Macho Fuck.

[CutterBill]

Sincerely
Macho Fuck.

[PaulG]

.... and there ya go... I did learn something - again on this site. Very informative.  My mildly modified FJ (brakes, suspension, exhaust) has so far been seemingly indestructible with its stock engine - even in my hands.  It's good to know that when the time comes for an engine rebuild (at this rate maybe when the sun explodes) I can get it rebuilt with a big bore kit by an experienced engine builder (maybe by that time even myself... ?) with confidence that it will function as good as stock.

With an engine design that's going past 30yrs old from the FJ-FJR-XJR series - like many have said - the engine components, quality kits, and specialists available have a proven track record.  This ain't the 70's where you pays yer money and takes yer chances. Dyno tests are no longer the exclusive perview of race shops. They are readily available for anyone now to tune them properly.

Maybe skiier did have a bad experience with a big bore kit on a previous bike, or on his "FJ".  I would guess IMHO it's not the failure of the big bore kit but the improper application or subsequent abuse of it.

I also learned do not Google search for images of Macho Fuck.  Definitely NSFW!  Seriously Don't! Trust me! 

[big r]

That bad eh, Paul 

[X-Ray]

Oh God, and I had to go look without thinking  

Yes it warrants a facepalm this big

[Flynt]

I also learned do not Google search for images of Macho Fuck.  Definitely NSFW!  Seriously Don't! Trust me! 

Ok...  I won't do that now.

Pat - your a legend! You Macho Fucker you!

Frank

[skiierfj1100]

Oh my god im sorry I didnt means to offend your sensibilities.
Jeez doesnt matter what the fuck one says on social media someone is always offended.
I didnt say anyone was stupid all I meant was do your own research and understand why things
are done the way they are.       
Ask randy why yamaha changed the slides on the carbs when they upsized fromm 1100 to 1200.
Stop being so easily offended.
GO FUCK YOURSELF.

[skiierfj1100]

I just rebuilt my engine to FACTORY specs....

Riiiight... because Randy at RPM and Andrews don't know anything about FJ motors, while you, on the other hand, are THE expert.

Go away, Junior...

Just telling you to do your own research and not take everything the experts say as gospel.
I dont know everything but I have an engineering degree and I can read.
Why dont you ask your experts why yamaha modded their carbs when they went
from 1100 to 1200.
All I was saying is factory specs are generally more reliable than aftermarket.
Dont be so easily offended youu little girl.