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+--- Thread: Josh’s bigger throttle bodies project (/showthread.php?tid=4490)
RE: Josh’s bigger throttle bodies project - pericleromano_imp - 10-28-2021
(10-24-2021, 01:25 PM)PowerDubs_imp Wrote: No- I would say wait- and see what results I get soon with my dual stacked custom made stacks.
They should give better results- but are NOT for a stock bike.
At the very least- you will need to add more fuel.
But also- there are many other ways to uncork the bike first- exhaust being the main one- get at least a slip on muffler, if not a full exhaust to get rid of the cat.
But no matter what- ANY change to the factory velocity stacks- you should add fuel.
Dear
Do you know these?
Is it okay to initiate a power boost?
Is there a big difference for you with a full exhaust on this bike?
I haven't experience with CB1100........
I imaging that to increase the fuel are needed the Power Commander module, whic model of PC are ok?
Thanks for your reply
RE: Josh’s bigger throttle bodies project - PowerDubs_imp - 10-28-2021
Yes- those are high quality mufflers and will sound nice too. Decent power gain.
And yes- a full exhaust will make even more power.
Powercommander is a good way for more fuel.
RE: Josh’s bigger throttle bodies project - pericleromano_imp - 10-28-2021
Is the CAT in the stock slip-on or in the stock tubes?
I imaging in the stock slip-on.....
Wich is the difference beetwins PC V and Guhl ECU reflash?
Do these changes make you lose the smoothness of delivery at low revs?
sorry for my bad english
RE: Josh’s bigger throttle bodies project - PowerDubs_imp - 10-28-2021
Cats are never in the muffler.
Cats are typically as close to the head pipes as possible for heat purposes.
PCV just adjusts fuel.
ECU tuning can adjust fuel, ignition, rev limiter, top speed limiter
These changes improve smoothness. Even just using an O2 bypass plug improves low speed smoothness.
RE: Josh’s bigger throttle bodies project - pericleromano_imp - 10-28-2021
So with Arrow silencers I don't remove the CAT.......
RE: Josh’s bigger throttle bodies project - Lord Popgun - 10-28-2021
The cat is welded on the header. Check this out: https://www.partsfish.com/oemparts/a/hon/511a8db9f870022e4ccd325b/exhaust-muffler
Item 1 is the header with cat. Item 5 is the muffler or silencer. They slip on and are clamped.
RE: Josh’s bigger throttle bodies project - pericleromano_imp - 10-28-2021
(10-28-2021, 03:09 AM)Lord Popgun_imp Wrote: The cat is welded on the header. Check this out: https://www.partsfish.com/oemparts/a/hon/511a8db9f870022e4ccd325b/exhaust-muffler
Item 1 is the header with cat. Item 5 is the muffler or silencer. They slip on and are clamped.
I went home and I checked ..... you are absolutely right.
If you get used pipes it is very simple and cheap to eliminate the catalysts........
RE: Josh’s bigger throttle bodies project - Uncle Sixer - 08-02-2025
How did the CB650R velocity stacks work? Has anyone else tried the same? Out of all the intake mods I have seen this appears to make the most sense to me... thinking about exhaust and intake options to be ready when winter comes...
RE: Josh’s bigger throttle bodies project - JLEECB - 10-12-2025
Webike now sells velocity stacks for our bikes. One of the guys on a Facebook got them already. My friend and I are ordering ours this week.
https://japan.webike.net/products/25914582.html
RE: Josh’s bigger throttle bodies project - Uncle Sixer - 10-12-2025
I just got CB650R velocity stacks from ebay for $91 plus 20 for shipping. It will be a bit before I get to install, but if they are a direct fit with similar size but better bore (not choked down) then I think they are well worth the price. I will try to report my results when possible.