Finally PERFORMANCE MODS For Yamaha 1.8 Motors

[Evil Sports]

So it not an issue to run without the ribbon ?

 

[Rod5]

Not to me. They are for flame spark suppressing in case of back fire. So as long as engine is in good running condition... But one must go with what one is comfortable with.

 

[Bruce]

The Coast Guard requires flame arrestors. On MR-1s some remove the ribbons and install an aftermarket air filter that serves as a flame arrestor.

 

[blacksapphirez]

i removed mine from 190 and also my 240. absolutely no issue and easy free gains.
While it is required, i do not feel the need for it. 0.000001% chance of burning down the boat...

I run 51 mph consistently.

 

[blacksapphirez]

Ribbon and Air box boot removed. Note the inside diameter of boot is less than the volume of ribbon.
View attachment 46887

@Rod5 where is the rubber piece around the metal ribbon? if it is still in the intake, TAKE IT OUT!

 

[swatski]

@Rod5 where is the rubber piece around the metal ribbon? if it is still in the intake, TAKE IT OUT!

Good catch. @Rod5 please check and remove if still there, save it with the ribbon.
Not the best picture below of mine removed from previous boat, but there it is - the black rubber "seal" around the ribbon -- if left behind it can disintegrate and then it gets sucked through the throttle body, a bad thing.

 

[swatski]

So it not an issue to run without the ribbon ?

If you are chasing performance "ribbon delete" is the #1 modification for Yamaha 1.8l engines. When done right it has never been shown to cause any adverse effects in these engines. The ECU automatically adjusts to increased air flow, it is free power and better fuel economy.
USCG mandates flame arrestors in boats (such as the ribbon in "ribbon delete") even though those play questionable role in fuel injected (not carburated) ignition systems.
The fix is to change the air filter to a "flame arrestor" type. No need to do this IMO, but if you want to play it safe there are RIVA air filters/flame arrestors to get you USCG compliance. Or a cheap automotive equivalent.

--

 

[Rod5]

The Riva rings today reuse the rubber spacer to keep the rings in place same as the ribbon.

 

[Rod5]

View attachment 46892 The Riva rings today reuse the rubber spacer to keep the rings in place same as the ribbon.

Here is the part number jetboatpilot sent me. I ordered them along with the Seadek kit in the group buy a few weeks ago.

 

[haknslash]

i removed mine from 190 and also my 240. absolutely no issue and easy free gains.
While it is required, i do not feel the need for it. 0.000001% chance of burning down the boat...

I run 51 mph consistently.

Can confirm. This man's boat runs like a bat outta Hell . I will remove my ribbon and beat you one day muhahahaha !

 

[blacksapphirez]

i just find that the RIVA ring is totally unnecessary... each cylinder will draw in necessary air as the pistons & valves move.

 

[swatski]

i just find that the RIVA ring is totally unnecessary... each cylinder will draw in necessary air as the pistons & valves move.

Yeah yeah yeah. But the rings look good! LOL.

But in all seriousness, I actually think I'm going to buy those and put them in this time.

Obviously the engines suck enough air even through those ribbons which is striking! So you are correct, no doubt. But the thing is, I've never come across anyone testing with and without those rings. So it could be a bit like with the air filters, you can gain additional 30-50 RPM, who knows. I just want to do it and be done. @Rod5 did us a great favor with this refresher here!

 

[swatski]

View attachment 46892 The Riva rings today reuse the rubber spacer to keep the rings in place same as the ribbon.

Thank you - great refresher on this topic!

 

[Neutron]

View attachment 46888
Nice SM @Neutron, what bike is it?
We lover our Super Duke.

Thanks.... its a 14 Suzuki DRZ400sm but after the first 100 miles decided it needed more power so i went big bore cylinder, race cams, and mechanical flat slide carb. Went from 30hp stock to 51 hp now.
I was spoiled when i lived up north had 24 7 access to a performance bike shop with a dyno so my bikes have been tuned to be optimal with what i put in it.
My FZ1 is tuned and modded as well
Want to get a Ducati Hypermotard some day. And the new FZ10. And the new FJ1300..... man so many toys so little space and money.lol

Sorry for the sidetrack....

 

[Rod5]

Nice

Thanks.... its a 14 Suzuki DRZ400sm but after the first 100 miles decided it needed more power so i went big bore cylinder, race cams, and mechanical flat slide carb. Went from 30hp stock to 51 hp now.
I was spoiled when i lived up north had 24 7 access to a performance bike shop with a dyno so my bikes have been tuned to be optimal with what i put in it.
My FZ1 is tuned and modded as well
Want to get a Ducati Hypermotard some day. And the new FZ10. And the new FJ1300..... man so many toys so little space and money.lol

Sorry for the sidetrack....

Nice! I thought it looked like the DRZ. I had the FZ1 once too (my second most favorite bike ever) a few bikes back before I switched to the KTM's. Had the SMC 640, then the 990 Super Duke before I got the 1290 Duke last year. I thought about the Duc Hyper, but decided to stick with the KTM.
Apologies for the sidetrack everyone, its a bike thing... you know... just like the boat thing...

 

[Evil Sports]

Unfortunately this is the only bike my family would sign off on for me after 2 in a previous life.

 

[swatski]

Unfortunately this is the only bike my family would sign off on for me after 2 in a previous life.

Too funny! I was allowed to get a new bike but -- with a sidecar. So, I got a custom Ural Retro (M72 replica) which turned out to be a hoot. Incidentally, those are also pretty hard to handle and dangerous to ride actually, but wife thinks it is safer BECAUSE it has a sidecar... Go figure.
Then, I was (finally) allowed a scooter (Cheers! @Evil Sports). So, I got one: Suzuki Burgman 650 ABS Executive, LOL, which goes over 100mph (I'm told ).
I know, it was a bit sneaky. But I just could not give up motorcycling.

--

 

[Rod5]

Unfortunately this is the only bike my family would sign off on for me after 2 in a previous life.

That's hilarious!!! What an awesome interjection there Evil Sports... LMAO!!!

 

[haknslash]

I had a DRZ but it was the dual sport S model. You should get the DRZ400E subframe if you want to shave some weight (approx 1.5 lb but its up high so...) and you don't carry loads on your SM. In the end that bike was way too heavy so I went with the KTM 530 EXC and never looked back at the Zuke again. Personally I didn't care for the Hypermotard compared to the Super Duke 1290. So much power and torque with the SD. If I ever get another bike it'll be the 1290R.

 

[Evil Sports]

Rod, Im serious. That 65mph sweetie is sitting in my garage down in Florida waiting for me equipped with a blue tooth speaker and Handlebar smart phone holder. Not to mention it was only $2900 new out the door.Boom!!