Posted in slowest. Not sure what turbo kit, boost levels, etc.
That is a pic of my engine. It is running a Evo Powersports 210 pump gas kit. It had 455 miles on it when it let go.Posted in slowest. Not sure what turbo kit, boost levels, etc.
I was almost to the parking lot coming down from about 8,000', and was around 5,000' elevation when it let go. It runs 9-10 lbs of boost with an intercooler and pulled timing...
Here is a notice from Yamaha received yesterday.
ATTENTION: Yamaha Snowmobile Dealers
DATE: January 22, 2016
SUBJECT: Accessory MPI "All Elevation/Low Elevation" Turbo Kit Advisory
Yamaha Motor Corporation, U.S.A. is advising that the "All Elevation/Low Elevation" Turbo Kit with the Electronic Altitude Boost Controller (EABC) manufactured by MPI (Mountain Performance, Inc.), Yamaha p/n SMA-8JP17-00-TB, should not be used on 2016-model SRViper snowmobiles unless very specific instructions are followed (see below).
MPI has reported issues with this product (i.e., miscalibrated controller units that can result in a serious "overboost" condition). Technicians are to refer to the YDS message posted on January 4, 2016, titled "MPI Alert Regarding Turbo Kit SMA-8JP17-00-TB for SRViper -- Updated" and the MPI technical bulletin titled "TSB-1505-CA – EABC Electronic Altitude Boost Controller Reprogram Campaign."All MPI turbos should be checked as per these instructions and updated as necessary. Failure to do so may result in the faulty boost controller causing serious engine failures.
As per MPI, immediately disconnect (disable) the boost controller if the unit has not been recalibrated. Dealers and customers must be made aware that turbo kits are purposely designed for specific operating
conditions and require very specialized service for proper set-up and long-term durability — regardless of
type. It is highly advised that all turbo installations be performed by a Yamaha dealer with experience in turbo installation and tuning. Failure to set-up units and test/tune properly could cause performance issues and unintended consequential damage. Further, all such installations require the addition of a high-quality boost gauge (not included) as well as precise clutch calibration for proper shift RPM.
Once a known good (or recalibrated) boost controller and boost gauge are installed, the SRViper needs to be re-clutched so it runs in the recommended shift range of 8400~8600 RPM. Maximum boost is not to exceed 5 psi. Following these guidelines for proper set-up are crucial for long-term durability and customer satisfaction.
Thorough set-up and proper checking procedures must be followed when making this high-performance modification. If you are unsure of proper installation, testing, or equipment required, you may request assistance either by contacting an RTA @ 800-879-0078, filing an Online Tech Assistance on YDS (Service>Online Tech Support>New Request), or contacting MPI.
There is a great deal of misinformation about this issue on web boards and in user group communications. Additionally, it has come to our attention that some market areas may be experiencing issues not attributable to MPI Turbo Kits. Yamaha is currently in the process of investigating all reported issues. We will address the causes and will share what we learn with dealers and customers as soon as possible.
Again, we urge you to take the steps provided above without delay. If this situation causes you any inconvenience, we apologize. We also thank you for your understanding. Yamaha is committed to dealer and customer satisfaction. We are providing this additional communication to help ensure the SRViper’s durability and provide trouble-free service.
Service and Warranty Departments
Yamaha Motor Corporation, U.S.A.
Thanks for posting that. At least we know they read the "Web Boards" Yamaha we would not be misinformed if we knew what was going on. This does not really give any information other than the 16's are different and require different treatment which is a direct counter statement of your previous statement. Seen below.
Genesis Triple Gets Revisions to Accommodate New Suppliers and Better Commonality Among Different Applications.
November 26, 2015(Toronto, ON) – Yamaha Motor Canada announced today a running change to the Genesis three cylinder 1050cc, 4-stroke engine used in the majority of 2016 model SR Vipers, RS Vectors, RS Ventures and VK Professional II snowmobiles. The engine has received many changes to different parts which have been sourced from new suppliers. It is important to understand the following background points;
· The output of the engine has not changed. The engine maintains the same level of power and response as the previous version.
· The quality and durability of the engine has not changed. The engine meets the same level of quality assurance as the previous version.
· Fuel consumption and emissions have not changed.
NOTE: In the case of the RS Vector and RS Venture, the addition of YCC-T electronic throttle control and new CVT calibration have contributed to an overall improvement in power delivery and fuel consumption based on the selected operating mode and operation of the vehicle.
Several parts were re-designed for ‘commonality’ to allow the engine to be used in more than one application. Versions of this engine are now being used in various snowmobile, side by side and marine applications. It is important to note that many replacement parts will not supersede from the original design.
The changes to the engine have no impact on the overall performance of the snowmobile and there are no practical benefits to the end user.
sk-rx1
TY 4 Stroke Guru
Kind of sounds to me that they are attributing/blaming the 2016 issues on problems with the MPI controller. I don't have a turbo and don't intend to but this situation is very disappointing of Yamaha. I did hear there were some major issues within the company over this issue.
STAIN
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From who? Just curios on your source.
sk-rx1
TY 4 Stroke Guru
Can't say, just heard from someone who knew someone in Yamaha that not all were happy with how this came about.
yamamarc
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from my aunt's, cousin's, friend's, boyfriend's father..lol sorry I couldn't help it!!!
no insult intended just playing around!!!
It is all fine and dandy if they want to produce a sled that is only capable of handling the lower amount of boost.
The issue for those of us that bought the 16's with the expectation that the engine was the same as the prior year and was capable of handling more. Most of us would not have bought them had we known the truth.
Heck they didn't even send out the bulletin that they changed them until the end of November! After most all the sleds had been sold for the season. They built them in March.... If it looks like fish, and smells like fish, it's fish..
The issue for those of us that bought the 16's with the expectation that the engine was the same as the prior year and was capable of handling more. Most of us would not have bought them had we known the truth.
Heck they didn't even send out the bulletin that they changed them until the end of November! After most all the sleds had been sold for the season. They built them in March.... If it looks like fish, and smells like fish, it's fish..
JoshBailey
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I can't agree more I didn't spend my money to find out after the fact
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sk-rx1
TY 4 Stroke Guru
Deserved........from my aunt's, cousin's, friend's, boyfriend's father..lol sorry I couldn't help it!!!
no insult intended just playing around!!!
SmittyAllSeason
Veteran
I agree completely. I have 720 miles on my 2016 LTX LE w/ MPI Trail Kit. This issue of changing the engine design but stating it is equivalent is bs. I worry every time I run my Viper wide open, will the engine remain durable. I sure hope this boosted engine is as good as my previous Yamaha 4-strokes. Only time will tell. Good thing I purchased the 5 year extended warranty and have an excellent dealer!
Michael Geil
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they broke the golden rule if its not broke dont fix it!!!!!
Pjw350
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This is exactly how I feel. I would have saves a few grand and bought a leftover 15
I want a yzx but the rod issue poses me off . Best motor out there except the apex and they "improve" it!
Joe ltx-le
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Yamaha is not blaming this on the boost controller. The reason they mention it so much is because this is the only kit they actually had installed by dealers and warrantied.
I have an early build 2016 but I was still sent the recommended engine rpm specs from Yamaha. They recommend 8600 rpm with new engine. Very unfortunate for all of those who bought late builds and unfortunate for mpi they are taking the heat for Yamahas fu*k up with changing these tested and proven engines. These sleds with the 180 kit and original engine really haul the mail and work well.
