norton f1 asbo exhaust informations.

[litoskin]

I have seen these exhaust for norton f1 they seems very beautiful and well done.Uploaded with ImageShack.usAnyone here has ever tried one of these on their f1 or f1 sport? is it simple to mount ? does it need some changes on engine or carburation? the second hole on the exhaust is the air extractor where it must be connected?My norton f1 has 13000 miles and is not molybdenum coated but it goes very well, i never had any problem except some overheating problems on hot season.Mounting these exhaust what increasing in performance is possible to achieve ? is the sound too much for a road use ?Regards and thank you very much for the help.

[Wayne]

Hi F1 The battery must be moved under the seat (Mods available)and the old battery box removed. The pelenium chamber removed and replaced with a adaptor to suit the hose, this is not a std part and will need to be made. The mod would also benefit from a twin rad conversion. Air filters re fit plus 2 more (may as well fit the carbs straight on the inlet stubs). I have been told Rejetting the carbs is not required. Your main worry will be getting the hose not to foul the faring and mudguard. Seek advice on correct tick over speed, you still need the correct vacuum at tick over, Micron got this wrong on the Nrs588 bikes the nozzle was too large. Geoff at Asbo has been running his bike for years with his ejector exhaust have a word with himF1 SportI will leave to others more knowledgeable than meThe work I have seen by Geoff is good quality, surprisingly the original Gibson and Micron exhausts don’t look that pretty close up, by the way Gibson don’t want to know, I asked them to make me some inlet tubes (as they made the Rc and Rcw ones), and was told a resounding no NotesMost of the race bikes extra power is from the ejector exhaust but not all, its also from36mm ID inlet tubes and at correct length Timing changed from 18 to 25 degrees (the exhaust headers then glow white hot under load)Porting of inlet and exhaust rotor housingsLowering the spark plug in the rotor housing (do not try this without expert consultation)Twin plug race housings give 6bhp extra over single plugLightened fly wheel more torque Forced draft air box up to 10 bhp depending on speedForced draft rotor cooling in conjunction with the exhaustPressurised petrol, unsure on this other than faster fuel flow10 to 1 Rotors (duckhams bikes)There are more knowledgeable members on the forum than me and I am sure the will ad to this. Regards Wayne

[Wayne]

Forgot to say you must use the corect premix in the petrol tank to lubricate the rotor tips with a ejector exhaust, you still put oil in the oiltank as well.On the noize front speek to geoff, there not road leagle in the uk

[litoskin]

Thank you very much wayne. unfortunately i live in Italy and here no one know the norton wankel engine .For what i have seen you have to made many modifications with the aid of someone with lot of experience with this kind of engines. and i don't want to made some errors and blow up the engine...Maybe sooner or later my bike need to come back in the country of origin to made a complete rebuild of the engine with molybdenum coated and probably i would like to fit also the race exhaust and tune the engine.Do you know a place where i can do all these things together or i need to carry my bike to different specialists? Thank you very much and sorry for my poor english... Marco

[Interpol2471]

Hi Marco if you wanted to just replace the exhaust you can do that without any modifications aother than removing the old and fitting the new. You would not be able to use the ejector but Geoff provides a blanking cover as per your original picture.The only thing I found when fitting to a friends Commander was that we had to re-tune the carbs for perfect performance but they may have been poorly set up prior to this.I would ask Geoff madden about this as he is the expert and would build you the exhaust to order with full fitting instructions to help you, he is a really nice chap give hime a try.What Wayne has done is correctly describe to you what would need to be done it you wished to remove your engine and fully tune for maximum performance and to fit the ejector system but the exhaust would give you extra power and sounds alone. Fitting twin rads would deffinately help your overheating issue but it may also be worth while back flushing and cleaning the rad system first if this has not been done and of course the battery can stay where it is if the ejector is not used. Regards Paul

[Interpol2471]

As to rebuilds in your post you could contact Richard Negus on this forum or also StartRight Motorcycles in Leeds.Both are experts and can provide moly services.

[Wayne]

Hi MarcoThe only thing on the exhaust, I would check with Geoff if fitting his exhaust without using the extractor will give you real extra power. The F1 runs hot far hotter than a comander, you get a cooler denser mixture with the extractor freeing the f1s power. I first looked at fitting the ejector exhaust in 92 on my F1 and was talked out of it by the factory. This dose not mean that you should not do it, just ask your self what you want from it more noise or noise and powerTuning the engine, its more involved than I described plus reworking the rotor housings can go wrong, they warn you beforehand ie its your risk? Before contacting the men who can do this (there’s only two people to my knowledge who could do the porting) my advice would be wait till your in a position to go ahead. On changing the coolant, one of the jps team members told me the F1 engine traps air, they told me squeeze tubes to expel air then host the front end in the air, easy on a race bike, they were adamant this applies to the road bike as well. All I can say is I follow this method after been told and my f1 never goes near the red..On the forum there are at least three ex Norton staff who’s knowledge far exceeds mine by a mile, plus graham at Startright who also has a vast knowledge also exceeding mine by a mile.Regards Wayne

[litoskin]

Hi Wayne and Paul thank you very much for your kind replies...Now things are much clearer for me...To tell the truth i'm not interested in sound as for me the less db comes out from the exhaust more happy i will be but sometimes this is impossible so i could live also with tremendous noise coming from my f1 if the engines works great. I Would like to do these modifications for increasing the power of my f1 not for sound or look of the bike .I don't want to change my F1 on a factory rcw but i would like to give her a little bit of extra power and a smooth ride.I use my F1 on road and here during hot season the temperature is a lot higher than in the UK , i use my F1 on mountain roads and very often during climbing the temperature increase too much so i thought with an exhaust with air ejector the situation will improuve a little bit right?If i use the bike on cold season the bike it seems it gains at least 20 hp !!I don't want an hard tuning of the bike (i could leave the engine completely stock ,only with moly upgrade) the because the reliability is important for me primary because is not easy to repair the bike here if something goes wrong.Do you think if i take the bike to Richard or Graham they could make all modification for installing the ejector exhaust ?To came back with the bike in UK is a big travel for me (about 5000 km...)i have done it once when i have bought it but i need the work to be done in few days becouse i need to come back in a week or so .Maybe is better to order the exhaust before and ship it to the one who will install it.The second option is buy the exhaust with detailed fitting instruction , send via post only the engine for moly and install the exhaust here in Italy as soon as the engine will come back .This will be the cheaper solution but i'm not sure if we are able to solve problems if they occur...What a mess I will think about it,i will try to get some more informations (time, price .....) and for this spring i will decide if and where i will do the job .My F1 is my dream i allways wanted to have one and now i could be in peace i'm finding all ways to complicate my life !! This wankel engine is blowing my mind !!regardsMarco