That is correct as it, the sai, bypasses the combustion chamber but can cause excessive leaning and so popping and banging in the exhaust. The other added advantage is that it cleans up and minimalises that area for any future servicing.
When we use the word lean it is generally referring to the fuel/air ratio entering the combustion chamber prior to the compression stroke. The exhaust gasses being emitted from the combustion chamber after the power stroke will contain some unburnt fuel. If you have fitted an aftermarket exhaust system the amount of this unburnt fuel may well be higher than it was before. The sole purpose of injecting fresh air into the exhaust flow is to create an after burn process in the header pipes that will burn up the remaining fuel parts that have escaped into the exhaust. (Burned fuel is better for the environment than unburned fuel). The injected air (Oxygen) does not cause excessive leaning, the popping and banging you refer to is the injected oxygen creating an environment which allows the unspent fuel to burn completely before it is expelled into the atmosphere. In the absence of the secondary air injection you will just emit those unburnt fuel particles into the atmosphere Apologies but I didn’t understand what you meant by “it cleans up and minimalises that area for any future servicing”. What area are you referring to and are these benefits with or without the SAI system in operation? The only area I could think of is the reverse face and stem of the exhaust valve.
Yep, @Mrs Visor, my purchase justification brain works like your does. The cost of the Sena was more than balanced out by the great deal that I got first and foremost on the helmet itself and also on my purchase of the aftermarket transition face shield. And I certainly agree with you about that satisfying feeling of finding kit that feels right. My 230 mile ride in this helmet setup yesterday confirmed my cash layout (well, credit card...).
How did you find the Sena in the airflow, it looks fairly large but maybe that’s a photographic illusion?
As in decluttering the area. If the system was just a mechanical one then I fully agree with what you are saying but then why does it need a two pin connection to the ecu? Anyway, I test rode it yesterday around home and the new pipe (with sai delete) hasn't created any issues, popping, banging etc and if anything allows the bike to rev freer (is that a word?). Very smooth low down with no surging or snatchiness so all good. Whether the sai delete did, or didn't, do any good, is purely academic now really as I'm happy with the outcome ..... plus it sounds faster
How can you criticise a Blade after what the Morcambe Missile achieved repeatedly on the most demanding race track in the world?
It’s actually quite low profile, @Baza. Unlike my older Sena models, it does not have a bracket that it fits into, but it is taped with ultra strength tape directly to the side of the helmet. Also it is flatter and a little smaller than my Sena 20S Evo unit. I am well pleased with it.
Glad your enjoying it and pleased with it @Sandi T but can't see myself buying one, I enjoy the peace and quiet when me and the wife's out together One of the benefits of motorcycling
I got a pair of Maun Pliers for my tool bag. They replace a larger and heavier pair I normally carry. I like the parallel jaws. I also have pliers in my multitool for things these pliers can't do.
I have a similar Bahco parallel pair and find I usually use those over conventional pliers. Good handy tool to have.
That's a really good looking helmet and glad you're enjoying the Sena 50R. How are you finding the Transition shield? I ask because I'm jealous, I'd have loved that option on my Shoei GT Air 2. My head shape best suits Shoeis, but the only helmet they made a Transitions shield for was the Ryd, but it was a £190 option and the Ryd didn't have integrated coms, a drop down sun-visor and very limited colourways. I'm old enough now to need prescription glasses, so my "sunglasses" are glasses with the same Transitions coating. In my experience that coating is superb colour neutral and changes appropriately quickly. A transitions shield combined with Shoei's Amber poor weather conditions optional drop down visor (which works really well) would have been be my perfect combination.
Hi, @RevPaul. I am very happy with the ProTint shield that Bell makes (my specific shield is the Panovision). It functions great, much better than the transition shield I have for my Shoei helmets. The Bell shield gets nearly perfectly clear so is good for nighttime riding. And it gets very dark which is critical for the brilliantly sunny desert in which I live and ride. In fact, my Bell SRT modular has a dark drop down inner shield and when the sun is really blasting away, I sometimes need and use both the dark face shield and the inner shield. The transitions happen more quickly than on my Shoei shield. Additionally, the retail price for the Bell shield is $150. I got it on sale for $112 . My Shoei Transition Photochromic shied was $199 and I've never seen it go on sale. I've also noticed that the clarity on my Bell shields (clear, Dark Smoke, and ProTint) seems better than that of my Shoei face shields. It's very cool that your glasses have the Transition coating. I will add that I find the comfort, fit, and quietness of my Shoei helmets is a bit better than the Bells I've had. But overall both brands fit me well. I had some Bell helmets some years ago that were a bit too round for my head shape but evidently Bell has changed their shape from more of a round oval to an intermediate oval for most of their helmets.
They reckon that you have either an Arai OR a Shoei shaped bonce. Somewhere I have an unused photochromic Pinlock insert for the visor on one of my earlier RX7s, so not the latest Max view one. If I can lay my hands on it, it will be FoC. With just P&P to negotiate if it has to cross many leagues of ocean. I will post further when, and if I find it.
Just added the backrest for Mrs C, she wanted to ride pillion a bit more but wanted something behind her to feel secure. It won’t be staying on the bike permanently but it’s easy enough to fit and remove and doesn’t look too bad at all.
Before. After Birthday pressies from one of our sons. They took two hours to fit (both of us). NB. Was originally posted on another thread. Also you are looking for three different accessories.
