007 is good on 21-5k.....not so much the 3 port.......try a 9886/086.

what up Monty!

it should but not necessarily that it will for sure as pistons/sleeves are all different sizes and it only takes a few thousandths of an inch to make it too big or too small . try it out , it should work but maybe not

its a decent pipe for most novarossi engines but its not the best .\

the dynamite 086hs is a great pipe for the n21r limited

How do the FMS and ToroNero compare?

I hope others chime in but IMO the fms is much better

i know Dennis , i'm sorry , it was offered to me after your purchase bro

I am loving my FMS, it has power from botom to top, the toro is ok on slippery tracks, but when you need torque, it falls short.....

I think I pulled a wheelie on the straitaway a couple times last weeked. Amazing power, easy to tune, looks sick, what else is there.....

sent you a pm houston

Sent you one as well

May I ask you for your carb settings? I've got a FMS and think I may have my carb out of balance. Just give me an idea from flush on the low and high needle. Which carb insert? Thanks in advance.

I do know the bottom end is flush with the outside, and the top end is just under flush. I am using the 7mm restrictor. You might go back and reset the idle gap.Then retune the bottom end and then the top.... I usually run it a little less than 1mm on most nova engines, I really don't have a whole lot of time on this engine. A little more than a gallon. and try the 97t odonnell plug. It works darn good.....

What is your engine doing? Give me more info and I will try to help.......

I'm sure you will get more suggestions too that might help......

I'm kinda like you,I only have 2.5 gallons through mine. I finally got to race it a few weekends ago and used the 6.5mm insert which was good while the track was dry. My tune was changing a lot(may be AE fuel tank,gonna try xray tank on next outting) and right before the main it rained and made the track muddy. About 3 minutes into the main I overheated and died. After changing plugs and richening the main, I got back into the race but my engine was very weak on bottom(like too lean) and the main was very rich. I gonna try the xray tank and start with the 8mm insert on my next visit to the track. My needles are about the same as yours. I run 25% fuel and had the odonnell 77t plug in. I'm thinking the 6.5mm insert and the muddy track was most of my problem. Thanks for the info.

mud does not promote a well running engine

base needle settings for fms - 4.75-5 turns out on low speed , 3.5-3.75 turns out on high speed , close idle gap until it just closes (insert out) and reopen .75 - 1 turn.

this will get you a little rich of race tune and remember these engines need more fuel on low speed ( richer setting )

you know your fuel delivery system is right when your engine runs consistant , if the engine runs erratic then you need to inspect and fix as necessary

hope this helps and happy motorin',
monty

Monty, would you also recommend the 086 for the N21RL on a tighter track layout? I thought the 086 was more hi-rpm-oriented...

thanks

Trying mine with 9901 for a maiden race this weekend. it still pinches a *bit* at TDC but it's almost there after 3L+ of fuel. I ditched the POS stock carb though and put my Plus4's on it, the idle screw is a PITA to get to... Hopefully I can find someone to help me tune this baby at the track as I'm really hopeless with engine tuning

Paul

what pipe header combo are you guys running on your FMS for truggy... also should i re-shim for 30%... mine came .7