Adding variable valve tech to my Yamaha R15 v1?

RenuKumar · 23rd March 2019, 13:51

Dear enthusiasts,

I rode the Yamaha R15 version 3 recently and I felt that there is a huge gain in the acceleration and one of the reasons is the the new Variable Valve technology that is added to it.

Is it possible to use the variable valve on the R15 version 1 engine? If yes, how?

PratikPatel · 23rd March 2019, 19:16

Well, it’s certainly not a bolt on if you are thinking in those terms. With the bore being 1mm bigger (5cc extra) than V1 & V2 the head assembly is not a direct bolt on. The variable cam assembly will not fit in the V1/V2 head. Also the ECU will be different as the ignition maps will be different from V1/V2.

GTO · 24th March 2019, 09:53

As Pratik said, it's not really possible / simple / practical. But I have two thoughts to add. Frequently, in bikes & cars, a new engine might come out that existing owners crave for. If one really wants it:

- Do a lateral upgrade. Wait for the model with the new engine to hit the used market, sell yours and buy that. Because you're buying used, the upgrade won't be that expensive. Related thread (ARTICLE: The Beauty of Lateral Upgrades (Getting MORE CAR for LESS $$$)).

- Once the new model has been around for a while, you'll easily find its engine & ECU in the parts market (from total loss vehicles). Do a swap from a good shop (although I'd strongly urge a lateral upgrade as factory fit is factory fit).

RenuKumar · 17th April 2019, 13:17

Quote:

Originally Posted by PratikPatel

Well, it’s certainly not a bolt on if you are thinking in those terms. With the bore being 1mm bigger (5cc extra) than V1 & V2 the head assembly is not a direct bolt on. The variable cam assembly will not fit in the V1/V2 head. Also the ECU will be different as the ignition maps will be different from V1/V2.

Should wait for a total loss vehicle, so that we can swap the entire assembly. That's the easiest way to go about it I guess..

23rd March 2019, 13:51	#1
RenuKumar BHPian Join Date: Mar 2006 Location: Bangalore Posts: 136 Thanked: 109 Times	Adding variable valve tech to my Yamaha R15 v1? Dear enthusiasts, I rode the Yamaha R15 version 3 recently and I felt that there is a huge gain in the acceleration and one of the reasons is the the new Variable Valve technology that is added to it. Is it possible to use the variable valve on the R15 version 1 engine? If yes, how?
	() Thanks

23rd March 2019, 19:16	#2
PratikPatel BHPian Join Date: Sep 2010 Location: Mumbai Posts: 285 Thanked: 1,243 Times	re: Adding variable valve tech to my Yamaha R15 v1? Well, it’s certainly not a bolt on if you are thinking in those terms. With the bore being 1mm bigger (5cc extra) than V1 & V2 the head assembly is not a direct bolt on. The variable cam assembly will not fit in the V1/V2 head. Also the ECU will be different as the ignition maps will be different from V1/V2.
	(3) Thanks

24th March 2019, 09:53	#3
GTO Team-BHP Support Join Date: Feb 2004 Location: Bombay Posts: 70,545 Thanked: 300,755 Times View My Garage	Re: Adding variable valve tech to my Yamaha R15 v1? As Pratik said, it's not really possible / simple / practical. But I have two thoughts to add. Frequently, in bikes & cars, a new engine might come out that existing owners crave for. If one really wants it: - Do a lateral upgrade. Wait for the model with the new engine to hit the used market, sell yours and buy that. Because you're buying used, the upgrade won't be that expensive. Related thread (ARTICLE: The Beauty of Lateral Upgrades (Getting MORE CAR for LESS $$$)). - Once the new model has been around for a while, you'll easily find its engine & ECU in the parts market (from total loss vehicles). Do a swap from a good shop (although I'd strongly urge a lateral upgrade as factory fit is factory fit).
	(4) Thanks