I ran stock carbs on mine for a short time, it was very pipe happy on the low end, the 35s smoothed it out a lot for me. Much more usable power IMO
Trail bikes, FTW
My 421 serval liked the 35 pwks quite well
My +4 swinger was great because we have some nasty hills around in the bluffs and it made it much better for climbing. Also I was able to fit anywhere the yfzs could go and able to climb hills they couldn't
Never ran long travel but I think it would be awesome and I'll agree with your added shocks
Trail bikes, FTW