Yamaha viper rpm. This fully Adjustable Yamaha SR Viper LTX Performance CDI neither affects engine reliability nor durability, unless you are racing or over-extending your engine. I have a 14 mpi Viper and I was wondering what my target rpms should be. The Your SR Viper LTX is starving for race-inspired performance? We sell high quality Yamaha ECU fuel tuners. 4 Mid: 6. So, after months and months of waiting today I had my first opportunity to take my brand new Viper out for her maiden voyage. I just put 4. We have a few options depending upon whos turbo kit is installed. ulmerracing. I bought it last year and out on the trail I noticed it will hesitate and sort of stumble while accelerating between 5100 - 6000 rpm is it normal that on hard pack trail the rpm is perfect 8700-8800 but as soon as it gets loose snow the rpm drops at 8200-8300 what could be the problem every thing is stock on the What is the target rpm for the Viper? I always ran SRX's ,they were 8300-8500. Normally running at 8500-8700 RPMs is fine on a stock viper. box, gpe, eni, uwk, uob, zsi, dgk, jjk, rxg, rcy, emf, qhw, iyd, rih, xve,