Yamaha Gas EFI QuietTech PTV HP Question

villebacker · 08-04-2020, 10:05 PM

I have a 2017 EFI QuietTech PTV and the sticker on the body at the back of the seat shows the HP to be 8.9. A friend at the course recently bought a new 2020 and his sticker shows 12.29 HP. His brother then bought a used 2018 PTV and his shows 8.9 HP. I saw a 2019 PTV for sale and the sticker showed 12.29 HP. I called a Yamaha dealership today and asked what the difference in the motors was and he said none. They are all 11.5 HP and have been for years and to disregard the stickers.

Can someone that is up on newer Yamaha EFI gas carts enlighten me on these models and if there really is a HP difference? I have only driven my 2017 so don't know if the newer ones seem more powerful.

Thanks

cgtech · 08-04-2020, 11:40 PM

If you have seen the pencil-sized hole that the Quietech intake breathes through, you might believe the sticker. All in the name of "quiet" I suppose. You can make the hole bigger, but more intake noise may be heard.

J-ROB · 08-05-2020, 06:30 AM

Call Don Plowman and he will ensure that the sticker under your seat is wrong after you install his parts. Do it discreetly and then ask your friend and his brother to race you. After the race don't say anything, just point to your 8.9HP sticker

kgsc · 08-05-2020, 10:59 AM

Quote:

Originally Posted by cgtech

If you have seen the pencil-sized hole that the Quietech intake breathes through, you might believe the sticker. All in the name of "quiet" I suppose. You can make the hole bigger, but more intake noise may be heard.

Due tell.. Is this an approved Yamaha procedure?

camaroluvz28 · 08-05-2020, 11:14 AM

I am also a Yamaha dealer and the dealer is correct...standard gas Yamahas(not U-max or Adventurers) have a 357cc Engine that has 11.5 HP. However that being said I CAN verify what you are saying is true as I have a 2017 that does say 8.9 on the sticker and a 2020 that say 12.29...disregard these specs I dunno why they say that but will find out now that I am aware.

cgtech · 08-05-2020, 05:48 PM

This little elbow right here. It has what I'd call a significant restriction inside. It's a pain to get out.

villebacker · 08-05-2020, 09:04 PM

Can you tell a noticeable difference when you lessen that restriction? I already have Plowman air filter and clutches along with the spark resistor removed.

cgtech · 08-05-2020, 09:22 PM

Well, the jury is out on that one as of today. I want to take 2 brand new carts, test them side by side. Then I want to do "one at a time testing" by removing the baffle, opening up that elbow, and do real comparisons. I'm sure my boss will be ok with that, I just havent had the time to do it yet. This has been the busiest "off season" I've had in the 13 years I been doing this. Our "off season" jobs arent even done yet (like forklift maintenance & the other things that usually get their "off season" time afforded to them). Forklift usually gets a oil change, garage door maintenance, air compressor oil change, stuff like that.. not done yet. When it cools off here, will be even harder to do that.

kgsc · 08-06-2020, 06:50 AM

Not seeing many of these could you pull the air box off another model that is larger?

villebacker · 08-31-2020, 08:44 PM

Did you ever talk to Yamaha to find out what they said about the difference in the HP rating on their 2017 -2020 gas carts?

08-04-2020, 10:05 PM	#1
villebacker Gone Wild Join Date: Jan 2015 Location: Stephenville, TX Posts: 202	Yamaha Gas EFI QuietTech PTV HP Question I have a 2017 EFI QuietTech PTV and the sticker on the body at the back of the seat shows the HP to be 8.9. A friend at the course recently bought a new 2020 and his sticker shows 12.29 HP. His brother then bought a used 2018 PTV and his shows 8.9 HP. I saw a 2019 PTV for sale and the sticker showed 12.29 HP. I called a Yamaha dealership today and asked what the difference in the motors was and he said none. They are all 11.5 HP and have been for years and to disregard the stickers. Can someone that is up on newer Yamaha EFI gas carts enlighten me on these models and if there really is a HP difference? I have only driven my 2017 so don't know if the newer ones seem more powerful. Thanks

08-04-2020, 11:40 PM	#2
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: Yamaha Gas EFI QuietTech PTV HP Question If you have seen the pencil-sized hole that the Quietech intake breathes through, you might believe the sticker. All in the name of "quiet" I suppose. You can make the hole bigger, but more intake noise may be heard.

08-05-2020, 06:30 AM	#3
J-ROB Out to Lunch Join Date: Oct 2019 Location: Houston, TX Posts: 451	Re: Yamaha Gas EFI QuietTech PTV HP Question Call Don Plowman and he will ensure that the sticker under your seat is wrong after you install his parts. Do it discreetly and then ask your friend and his brother to race you. After the race don't say anything, just point to your 8.9HP sticker

08-05-2020, 11:14 AM	#5
camaroluvz28 Gone Wild Join Date: Sep 2010 Location: Florida Posts: 1,895	Re: Yamaha Gas EFI QuietTech PTV HP Question I am also a Yamaha dealer and the dealer is correct...standard gas Yamahas(not U-max or Adventurers) have a 357cc Engine that has 11.5 HP. However that being said I CAN verify what you are saying is true as I have a 2017 that does say 8.9 on the sticker and a 2020 that say 12.29...disregard these specs I dunno why they say that but will find out now that I am aware.

08-05-2020, 09:04 PM	#7
villebacker Gone Wild Join Date: Jan 2015 Location: Stephenville, TX Posts: 202	Re: Yamaha Gas EFI QuietTech PTV HP Question Can you tell a noticeable difference when you lessen that restriction? I already have Plowman air filter and clutches along with the spark resistor removed.

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08-05-2020, 09:22 PM	#8
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: Yamaha Gas EFI QuietTech PTV HP Question Well, the jury is out on that one as of today. I want to take 2 brand new carts, test them side by side. Then I want to do "one at a time testing" by removing the baffle, opening up that elbow, and do real comparisons. I'm sure my boss will be ok with that, I just havent had the time to do it yet. This has been the busiest "off season" I've had in the 13 years I been doing this. Our "off season" jobs arent even done yet (like forklift maintenance & the other things that usually get their "off season" time afforded to them). Forklift usually gets a oil change, garage door maintenance, air compressor oil change, stuff like that.. not done yet. When it cools off here, will be even harder to do that.

08-06-2020, 06:50 AM	#9
kgsc Gone Wild Join Date: Dec 2009 Location: Aiken, SC Posts: 13,188	Re: Yamaha Gas EFI QuietTech PTV HP Question Not seeing many of these could you pull the air box off another model that is larger?

08-31-2020, 08:44 PM	#10
villebacker Gone Wild Join Date: Jan 2015 Location: Stephenville, TX Posts: 202	Re: Yamaha Gas EFI QuietTech PTV HP Question Did you ever talk to Yamaha to find out what they said about the difference in the HP rating on their 2017 -2020 gas carts?

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