Opinion on FBF pistons?

[oasis]

Looking to swap out the pistons on my 2003 monster 1000s, what does everyone think of the FBF drop in high compression kit? pros/cons ?

Mike

[Duck-Stew]

I've used 1 set of drop-in 94mm hi-comp pistons and had no issues.

I haven't yet fired up the 98mm hi-comp motor but I expect no issues w/them.

Other members have had equal success w/them, I'm just the first to chime in...




(I've also used 4 sets of their 88mm hi-comp pistons in 750's w/o issue.)

[teddy037.3]

+1 on the 750 hi-comps  all pro, no con.

well, because of the E10 pump gas, the consensus was to stick to 11:1 pistons, otherwise I'd have gone 12:1

*sigh* oh, the memories...

[Slide Panda]

Just some things to consider

Your bike will run hotter. If you live in a hot area you may need additional cooling capacity
Your bike will require more octane

[DRKWNG]

Just some things to consider

Your bike will run hotter. If you live in a hot area you may need additional cooling capacity
Your bike will require more octane

And you're likely to need stronger pants, as you just might bust a seam after the first twist of the wrist. 

[ducatiz]

And you're likely to need stronger pants, as you just might bust a seam after the first twist of the wrist. 

Mine did not come with a 6 pack of burgers, yours did?

[DRKWNG]

Mine did not come with a 6 pack of burgers, yours did?

Nope. Prunes.

[DRKWNG]

My tech advised me to stay away from that route. Dollar for dollar its better to go with big bore kit. A little more work, a little more money, but way more worth it.

P.S. There's no replacement for displacement

Is this the same tech that led you to believe there was almost no difference in power output between a 750 and an S2R1000?

[ducatiz]

My tech advised me to stay away from that route. Dollar for dollar its better to go with big bore kit. A little more work, a little more money, but way more worth it.

P.S. There's no replacement for displacement

does your tech live in a cave with a bunch of old mopar parts?

the displacement argument is kind of silly these days

my 2.3l volvo put out 240hp whereas the current model xterra with a 4.0L v6 only puts out 260 hp.

engine design is far more important than mere displacement.  a well designed high-comp 900ss engine with stock compression will smoke a 944 with regular compression.

[DRKWNG]

First off, that topic was between a 750 and a 900 of similar years.

Really?

So clearly my numbers are off. But so are the manufacture numbers. Research finds the 00' 750 to stock out at 69hp. So my old dyno numbers must have been 79hp. But lets just say it was more like 75. Now my 08 S2R states 95. (No freakin way).  Motorcyclist show at 87. Which I still believe is high. So most likely the best case scenario is 12hp between typically modded 750 and stock S2R. Now clearly the numbers are debateable and the newer engines will respond much better. I'm just saying that there is not a real difference between the two. If someone feels he has outgrown a 750, then spending any money on a 900 would be futile. At very least step up to an 1100 with 95hp.

Really?

[DRKWNG]

Sure did.  Read right through everyone blowing holes in your argument that there wasn't a significant difference between either the 750, 900 or DS1000.

Anyhow, this is off topic.  Back to the thread at hand...

[ducpainter]

Did I merge threads? 

[DRKWNG]

 

[koko64]

Looking to swap out the pistons on my 2003 monster 1000s, what does everyone think of the FBF drop in high compression kit? pros/cons ?

Mike

Go for it. If you wanted you could go a big bore kit if you have the $$.

An option is DP cams. The stock cams are mild.
Increasing compression via managing head and base gasket thickness is worth investigating. Its worth checking with your tech if increasing compression through this option is possible.

Depends how much you got to spend. But me, I'd like to up the comp cheaply if possible with the stock pistons and use the money saved towards bigger cams.

[The Mad King Pepe']

engine design is far more important than mere displacement.  a well designed high-comp 900ss engine with stock compression will smoke a 944 with regular compression.

All true, however when someone goes the big bore route, usually they will also put in high-comp pistons. After all, since the pistons have to be changed anyway, it makes more sense to get some high-comp ones.