Second Generation Ascots > Tech Section

removing the stock airbox '83 (shadow)

<< < (6/9) > >>

J6G1Z:
The stock main jets were a #112 & #120.

The replacement jets are part of a DynoJet kit that uses their own unique jet identification numbers. The kit comes with 2 sets of jets, #118 & #122. These sizes do not correspond with Keihin or Mikuni sizing. The new jets are numbered as #124 & #126. Now I just need to get off my backside & replace the jets.

J.

scottly:
I kind of suspect the Dynojet kit assumes the stock air box with the snorkel is used, much the same as the 145 main commonly suggested for the FT?

J6G1Z:

--- Quote from: scottly on July 16, 2014, 11:26:01 pm ---I kind of suspect the Dynojet kit assumes the stock air box with the snorkel is used, much the same as the 145 main commonly suggested for the FT?
--- End quote ---

You are 100% correct. I talked to the DynoJet tech a couple of times. My original airbox had a few cracks in it (dried out) so I removed it & tried the UNI filter on the end of the intake plenum. That amount of air overwhelms the carbs/engine. The DynoJet tech told me the kit is built around the OEM airbox & that there was no extra power to be had by removing the box. I don't know if I agree, but they are the ones with the dyno, not me.

My first VT Ascot had about the same mods done to it, but it had a MAC dual exhaust vs. the dual Super-Trapp exhaust that is on this bike. The first bike ran with the OEM jetting (although lean) with the after-market exhaust & a gutted airbox with the snorkle removed & a velocity stack installed. The new bike has a bigger one piece '85-'86 Shadow filter installed. I just received the larger jets the other day & hope to have the time to install them today or tomorrow. Hopefully this will straighten everything out.

J.

J6G1Z:
Well, I installed the new larger jets. I chose the DynoJet's #124 main jet & went through the process of accessing the carb's float bowls. All pretty straight forward. About the only really difficult part is re-installing the common intake plenum. Trying to twist it into the frame opening, then lining up the end with the airbox & the two carb boots can be frustrating. After re-assembly, the bike fired right up. I let it warm up & revved it out a couple of times. The carbs seem to be responding correctly (Finally) & the bike appears to be running great. I did not have a chance to road test it yet. Hopefully that will be resolved later on today. I will follow up on this post as soon as I have some news.

J.

J6G1Z:
Guess what? Still not enough fuel at the top end! ::)

I knew I should have just gone with the larger jets to begin with. Oh well... I'm getting to be pretty quick at removing everything to gain access to the carbs.

J.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

Go to full version