Best DRZ 400 Performance Mod HOW TO: Replica FCR 39 Installation

Throttle Cable Bracket: www.ebay.de/itm/314782976996
Adapter Engine Side: www.ebay.de/itm/314750250050
Adapter Airbox Side Bellmouth Velocity Stack: www.ebay.de/itm/314750250049
0:00 Introduction
0:20 Disclaimer
0:57 Agenda - content of this video
2:32 Expected Performance Gains
2:46 Dyno Performance Graph
3:00 Explanation of the FCR 39 Carburetor
4:00 Problems with this FCR 39 for the DRZ 400 S/SM
5:27 What Adapters to get for the carb
7:19 Installation of Adapters
10:01 Other parts to get
11:18 Expected total cost
11:59 Jetting
16:16 Explanation of and Access to the Jets
22:53 Installation Instructions
Source for Dyno Performance Graph:
www.thumpertalk.com/forums/to...

[@shootix]

Wow I could have used that video a few weeks earlier. I managed to fit it in the DRZ and it worked fairly well, the problem was that mine from aliexpress had no choke and the not fitting rubber intake made me completely change it back to a mikuni tm36 I had in it earlier. But I still have all the parts and if my carb should break down or something I will definetly try to refit the fcr with your parts. Very nicely explained and really nice parts.

[@thisisnotharrypotter]

Thank you! it was a lot of work to figure everything out so I thought why not share it.
If you need any help in the future just send a message!

[@mei-tb6og]

Nice work. I ordered the carb also, now looking for a 3d print file for the airbox horn.

[@AlexCage19]

I wish I've seen this video earlier. I bought exact same carb although didn't get any adaptors but just trimmed off the red thing and flipped the original rubber boot and forced into the carb) Worked pretty well but I couldn't figure out the jetting as original FCR's mentions 155-160 main and 45 pilot but it was way too rich for me. Looking at your jetting I see that indeed it was too rich. Anyways it lasted not that long until the throttle plate rollers became loose and started wearing the insides of carb which made the throttle to stuck. I got enough of that carb and bought cvk 40 which is not that good as FCR but still better than stock. Now I just bought original FCR 39 from 2015 Beta with all DRZ adaptors for 300$. Got extremely lucky. But yet to install it

[@thisisnotharrypotter]

yes the DRZ / FCR39 Jetting you find online is for the E model DRZ. Which has a different exhaust header, different cams, different compression because of a thinner base gasket and the 3x3 airbox opening. It is therefor much too rich. Also worth noting for you installation is that the diameter of the E Model Airbox where it connects to the carb is different than that of the S/SM Airbox. Its smaller if i remember correctly. Thats why the OEM FCR39 Adapter for the E Model (you can get from suzuki) is not a good fit for the S/SM. Good Luck!

[@disfunctionaldiecast7908]

Hi mate ive got the E model so its got the airbox with the bigger hole. Its stock fcr but its driving me crazy . Do you think this will work for me and can i use the oem fcr throttle cabble bracket? Im interested , can you send me a link of what i need to put that on a 400E cheers

[@thisisnotharrypotter]

Hey mate, send me a message on eBay with a picture of the carb you have so I can see what adapters you can keep. You probably only need the Aluminium engine side adapter for the replica FCR. The eBay link is in this videos description

[@brianmcginn992]

Awesome video! I am confused about the two jets up by the intake. Do they allow unfiltered air in?

[@thisisnotharrypotter]

The red adapter that comes with the carb does, yes. But the adapter you can buy (link in description) gives them tunnels that go into the airbox so they get air that is filtered

[@PineMcTree]

Sweet! I’ll take a look

[@PineMcTree]

I checked the eBay listing for your adapter, very clean piece. Do you suppose it would work for a fcr41?

[@thisisnotharrypotter]

I’m not sure but it might fit. Send me a message on eBay we’ll figure it out 👍

[@motorcyclesnjny6598]

Question… replica works same as the Original??

[@thisisnotharrypotter]

yes its a perfect copy of the original

[@riskyavb9919]

Can you make a kit to run on a Polaris 500

[@thisisnotharrypotter]

the airbox side i can adapt for basically any atv/motorcycle model if there is demand for it. send me a mail at [e-mail]

[@adamtrumpie4779]

I need link for that intake adapter

[@thisisnotharrypotter]

hello adam, you can find it in the description!