84 1100 Rebuild Time

[alien-g]

Hay guys I'm at the point of a total rebuild starting at the 2nd gear replacement and moving up.
I'm taking the line of a street bandit pic i'm sure we have all seen.



can you guys give me some thread/links for engine rebuilds specifically cylinder swaps and bore outs, just need to see what's available.

My valves are all shot to shit, and i'v got to fix 2nd gear, and while i'm at it I might as well see what kits are available


Ta

[aviationfred]

The only engine kits that I know of are from Andrews Motorsports in Concord, North Carolina USA. They do offer shipping to Australia. There are currently 5 kits available. from mild to wild, pick your poison. Three kits are plug and play drop in kits while the larger two will require modification of the lower cases. A fellow FJ owner installed the 1380 kit and had the pistons modified to lower the compression ratio to better perform on pump gas.

1195cc drop in kit

http://andrewsmotorsports.mybigcommerce.com/engine-product-yamaha-fj-k1195-cc-wiseco-piston-cylinder-kit-fj1100-fj1200-big-bore-fj1100-block-11476m77241/

1250cc drop in kit

http://andrewsmotorsports.mybigcommerce.com/yamaha-fj-big-bore-fj1100-block-1250cc-wiseco-piston-kit-cylinder-block-1tx-11310-00-00-ck1250/

Here are the eBay links for the three kits.

1297cc drop in kit

http://www.ebay.com/itm/FJ1100-FJ1200-Custom-Big-Bore-1297cc-Wiseco-Pro-Lite-GP-Piston-Kit-Cylinder-/172033840050?hash=item280e0413b2:g:gvEAAOxyf1dTKK4S&vxp=mtr

1380cc kit

http://www.ebay.com/itm/Yamaha-FJ-FJ1100-FJ1200-XJR1300-1380cc-Ross-Piston-Cylinder-Kit-83mm-/181336625422?hash=item2a3881510e:g:TK0AAOxy-WxTD83o&vxp=mtr

1412cc kit

http://www.ebay.com/itm/Yamaha-FJ-FJ1100-FJ1200-XJR1300-1412cc-84mm-Ross-Piston-Cylinder-Kit-/172228832907?hash=item2819a36e8b:g:TK0AAOxy-WxTD83o&vxp=mtr


Here is the build thread for the 1297cc kit that I installed a year ago. http://www.fjowners.com/index.php?topic=14834.0


Fred

[alien-g]

Fred much appreciated will have a look through and see how I go, prob looking at the 1297 Kit however Might get the current head Bored here in Aus to save the cash.

As you mentioned in your reply up to the 1297 were straight fittouts yer no lower end work required?

Ta

[alien-g]

Fred Been through your rebuild that is awesome.

This is the same build that I'm looking at I hope you dont mind me racking your brain during my build.

Say your clutch what is it a slipper clutch? and that window who did you get to do that Very nice?

Ta

phil

[aviationfred]

Fred much appreciated will have a look through and see how I go, prob looking at the 1297 Kit however Might get the current head Bored here in Aus to save the cash.

As you mentioned in your reply up to the 1297 were straight fittouts yer no lower end work required?

Ta

Part of the reason I went with the Andrews 1297 kit was the custom cylinder sleeves that they use. With their sleeves there is no modifying of the lower cases. For oversized pistons, the general rule has always been. You can Bore the existing sleeves up to 1219cc's without resleeving and no modification of the lower cases. You have to resleeve starting at 1250cc's, using off the shelf Wiseco sleeves and pistons. The lower case has to be modified to accept the larger sleeves.

Another reason that I went with the complete cylinder and piston kit is that the precision work is already done by a very respected company that is well known within the FJ and Legends community. I had a very bad experience trying to get a FJ head re built locally a few years ago.

There is an Aussie or two that have big bore engines. Hopefully they will chime in on what they did.

Fred

[aviationfred]

Fred Been through your rebuild that is awesome.


Say your clutch what is it a slipper clutch? and that window who did you get to do that Very nice?

Ta

I have a slightly modified OEM clutch. The RED pressure plate is from A.P.E. and I use Barnett heavy duty coil springs. I have installed the wide inner fiber disc mod, along with the RPM Roller Shift Detent kit.

The clear clutch cover is a one off cover that I purchased from an XJR1300 owner in England.


Fred

[alien-g]

Nice one looking at the UK XJR Sites Now Gonna Have me 1 of them.

Found these guys, http://shop.mek.biz/product_info.php/info/p206_Klarsicht-Kupplungsdeckel-XJR.html/language/en

NICE

[skiierfj1100]

I just rebuilt my engine to FACTORY specs over those big bore kits after I did my research.
Every macho fuck out there wants a big bore kit. Big piston big power right?
Only if you get the airflow right.
The trouble is your compression increases way above factory and now you have extremely turbulent air
being sucked in your cylinders. You must now change the carb slides to compensate for the fucked up airflow.
If yo choose a 0.5mm or 1 mm oversize piston your motor stays within factory design specs and you dont need to
mod ur carbs.
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.

[Pat Conlon]

Skier, tell us more.....
Have you had a bad experience by which you base your opinion?
.....or are you just guessing?

[CutterBill]

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...

[big r]

 

[PaulG]

Oh boy!  An Argument!        I just might learn something here. What's next? 

[CutterBill]

Oh boy!  An Argument!   

No, it's not!   

[aviationfred]

I just rebuilt my engine to FACTORY specs over those big bore kits after I did my research.
Every macho fuck out there wants a big bore kit. Big piston big power right?

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.

I am not sure where you looked for your research. Randy Raduechel at RPM, Curt Andrews at Andrews Motorsports and Hank Scott at RRC Performance Engines are world class FJ engine builders. Both for the motorcycles and the Legends race cars. I NEEDED to rebuild my upper end due to massive oil consumption. I did not open a perfectly great running engine just to get a few more ponys. I did my research and determined if I was going to open the engine to repair the oil consumption, why not spend a small amount more and get a plug and play Big Bore kit. Your assumptions of a bad or funky running engine is WAY off. Obviously you have not read my engine build thread. I have over 10000 miles on my Big Bore engine and it runs and performs as if it rolled off the showroom floor yesterday, with some extra punch included. You need to understand....adding CC's to a FJ engine is no longer an experiment and has not been for many years. Randy, Curt and Hank Scott have the big bore builds down to a science.

Let me explain how close theses engine builders can get. I purchased my Big Bore kit from Andrews Motorsports, I installed it myself with the guidance of Randy @RPM and a few other forum members. RPM jetted, adjusted and installed a set of Hank Scott adjustable needles in a new set of carbs for me in California, based on my intake, exhaust mods and elevation in South Central Kansas. Literally, the very first time I pushed the starter button to start the engine, it fired off and ran. The only adjustment that I had to make was the idle. In closing....I bought my Big Bore kit to cure horrendous oil consumption and I got an everyday rider that no longer consumes oil and has a wicked punch whenever I crack the throttle a little extra. Am I happy with my Big Bore build....You bet I am, Do I think I would have been better off doing a Yamaha spec overbore? Not for the money involved.

Sorry guys....end of rant


Fred

[big r]

You tell him Fred.