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Post by aeroxbud on Oct 11, 2022 4:12:18 GMT -5
Yes it bankrupted Bimota trying to get it to work on the V due. And never worked very well then. |
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Post by hippo008 on Oct 11, 2022 7:57:55 GMT -5
The offer stands if you want to borrow it sometime in the future.
I am just scratching my head at this point. What could be broken/not working? It seems to me youve gone through the scoot with a fine tooth comb and found nothing but the problems persist.
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Post by 90GTVert on Oct 14, 2022 5:05:24 GMT -5
I set the float height at 18, 20 and 22mm yesterday and bench tested to see if fuel level changed. It did change each time. I totally expected it not to. I don't get why it changes now, but the last time the floats got about this heavy the fuel level would not move with different settings.
Whatever. Since I've cleaned it and can see that the level is able to change, I might as well put the carb back on and see what happens now. I had the mix screw about 2 turns out, which is way less than it was set. It did what it did at the show and just after. It would run on choke and then slowly die off choke.
I adjusted the mix screw farther out and idle started coming up and it would idle. I turned the idle speed down and fiddled with the mix screw a little more and now it will idle at around 2000RPM. I let it run while I put the seat back on and tools in and such and it chugged along fine. I took it for a quick lap around town and it didn't give me any trouble.
I'm assuming that my idle trouble at the show was one of 2 things or a combination of both. Perhaps there was some dirt or debris in there somewhere. After it overflowed, which may be related to heavier floats, it was a pretty dirty process trying to mess with the carb in the parking spot. The carb gets covered with black gunk and that gets on my hands while I'm trying to work on it so who knows. It probably also needed a larger pilot jet for the colder weather, or in general. Even before the trouble, I had the mix screw pretty far out. I was basically limited by how much I was willing to risk it falling out from being too lose. I probably should put a larger pilot in it anyway. I haven't counted, but it's probably 4 turns out or so even now with yesterday being around 70 degrees. I initially thought I needed a smaller pilot, but once I got the main jet to a better size the low end cleared up a lot. It probably also needs to go up to a 145 from a 142 in colder weather, or possibly larger.
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Post by 190mech on Oct 14, 2022 16:37:36 GMT -5
It takes a tiny bit of trash to hold the float needle off it's seat to make big problems!Have had multiple times when a fuel filter would delaminate internally and allow trash through,,clean carb (good) ride then flood again,,do this over a few times then replace the filter... If you are turning the pilot screw that far out,then a pilot jet change is needed..  |
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Post by repherence2 on Oct 20, 2022 17:14:43 GMT -5
i think that you are chasing a dynamic ghost.
there is nothing wrong with your tuning approach at all. there is nothing wrong with your applied logic either.
i think it is Vibration + Float Design of that carb.
i think that if you were using a carb that had a pivot float, it would be a very different experience. i think that Vibration + Float Bouyancy + Guide Pins + Angle result is a dynamic float inaccuracy. or rather, there is so much input interference that the float cannot properly self correct the fuel level.
i think that your Lectron carburetor might be worth revisiting now that you have a full race engine setup. now that you have a high strung engine, that Lectron might be the key that wakes up that dragon.
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Post by 90GTVert on Oct 25, 2022 12:35:49 GMT -5
The OC car show vid is up. It's short since we only did 2 laps and really didn't race or do so much with moto-cops coming out of nowhere and not running 100%, but I did a lot more editing than usual for car show vids in hopes that it's still fun to watch and conveys the experience. youtu.be/5h_g7toYllQ |
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Post by 90GTVert on Oct 31, 2022 10:58:08 GMT -5
Here's another person telling me how slow I am. He's commented elsewhere and seemed to have a clue, but here we go again... " Technically you're quite well prepared. You know the two strokes quite well and you have all the tools to work on them. But this bike seems weak as hell. I'm racing against RC engine-fitted Piaggios and Yamahas and they're like whenever you give full throttle the front wheel leaves the asphalt. At 60kph and at 120kph as well. Doesn't matter. And they can produce ~160-170kph (100-105mph) top speed. Now it seems your bike is around 20-22hp on the wheel.
Just to understand what I'm talking about: a 70cc very good rider has built an RC engine to another rider and set the bike on track. After 8-10 laps gave back to bike to the owner cause it was unrideably strong and he was slower with it than with the 70cc bike. The 94cc engine has so much torque you have to be careful how to ride it.
After all it's funny in the States you play with strong scooters beside the old V8 muscle cars  " Reply : "I'm going to guess that most of these riders aren't 300 pounds like me. Put a 300lb rider on one and show me GPS verified in opposite directions of travel 100MPH... unported cylinder, carb and pipe that came with the RC1. I'd love to see pure power wheelies from 75MPH with any rider. Better still, do that with a long frame and 13" wheels. No pulling on the bars or BS. I mean no offense, but those are huge claims that I don't see other people backing up with proof. I'm a YouTuber, so people talk crap to me every day about how slow I am and how fast they are and I'm not sure that anyone has ever proved anything in more than a decade of this so it's safe to say I'm skeptical of seemingly outrageous claims. About the muscle cars; I had a 1990 Mustang with an aftermarket block, bored, stroked, and so on with a turbo and I got rid of it after realizing I had as much or more fun with my scooters for much less money. I love horsepower of all types, but two-strokes are just awesome IMO. Most others in the US do not share that opinion and think scooters are nothing more than cheap transport or something that people ride because they got a DUI and two-strokes are for chainsaws and string trimmers and mostly annoying." I'll post the videos here of the 75MPH power wheelies with a "stock" RC-One as soon as I get them. I've said it many times, but the TMAX has 40+HP and I know that it's all it can do to see 100MPH GPS. Full tuck and there better not be a headwind or anything. |
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Post by 90GTVert on Nov 6, 2022 19:00:36 GMT -5
Rode to a friends house today. He’s a sport bike guy so after listening to him talk about 140MPH corners I had to open it up a little on the way home. Pales in comparison, but I let out at 80 because the EGT was flashing somewhere over 1300. Wasn’t even trying to tuck all the way in and didn’t hold it for long and it felt like it wanted to keep going. I did have some tail wind, but I’m confident it would have at least gone to 85 today if I were more willing to risk the engine.  I’m still trying to get people to race me. I’ve called out his 600 and his RC car. LOL |
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Post by 808ministroke on Nov 8, 2022 11:13:21 GMT -5
WELL SAID GRANT! F*#@k those modern day version of telephone tough guys, idk inbred internet idiots? I have only seen a HANDfULL of videos that deal with these scooters and have any varefiable proof in their videos, nit because it couldn't be done but because they don't want you to know. wi5h these bikes it's all about patience and spending the time to listen to what the bike actually wants and if there is anyone who put their time to tune in a never ending quest for more if they say they already have a bike that goes faster than anyone dreams and they didn't have to break it down and rebuild it at one point I start questioning the reality this *two stroke exists in.
And 80mph with more on the bone congrats!
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Post by Lucass2T on Nov 8, 2022 13:25:43 GMT -5
WELL SAID GRANT! F*#@k those modern day version of telephone tough guys, idk inbred internet idiots? I have only seen a HANDfULL of videos that deal with these scooters and have any varefiable proof in their videos, nit because it couldn't be done but because they don't want you to know. wi5h these bikes it's all about patience and spending the time to listen to what the bike actually wants and if there is anyone who put their time to tune in a never ending quest for more if they say they already have a bike that goes faster than anyone dreams and they didn't have to break it down and rebuild it at one point I start questioning the reality this *two stroke exists in. And 80mph with more on the bone congrats! It's so weird to see a long gone scene from Europe sort of re-live in America. From the first moments internet boards where around about about 20yrs ago, kids are arguing over other ppl's statements on how fast or how quick someone scooty scoot was. And yeah Brent is very meticulous with testing and reporting his work. Never seen that before. Keep going dude, you're doing great work!!! |
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Post by 90GTVert on Nov 9, 2022 18:41:59 GMT -5
Today I'm being told that my carb tune is wrong because it makes sputtering noises when I'm going slow so I need a smaller main jet and change the needle setting. Thought he just didn't get that it's a two-stroke till he asked me to post 2 mile WOT plug chops in the next vid. Can't say I've ever done a 2 mile WOT plug chop to address a sputter at 1/8 throttle when it's off the pipe. I've never even ran this thing 2 miles WOT I don't think. When I was up to 80 the other day it was WOT for maybe 1/2 mile.
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sinfull
Scoot Enthusiast
Posts: 251
Member is Online
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Post by sinfull on Nov 12, 2022 20:46:40 GMT -5
Don't worry about other people, they know how to tune YOUR bike, just don't ask them to show you their bike 😉
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Post by 90GTVert on Nov 19, 2022 18:43:50 GMT -5
It was 45F today and I rode for an hour and a half. Ran fine aside from not being able to hold WOT for long before EGT was over 1300. Idle was OK. I thought it would act up like the car show, but it never faltered.
I've probably said it a thousand times in this thread, but after not riding T2 much for a bit, it's pretty funny riding it through a larger town, echoing off of everything. Riding around a strip mall and watching people stop what they're doing to look. Probably thinking "what the hell is that?" or "what the hell is wrong with him?". Sitting at a red light with concrete and brick buildings in close proximity while a group of people wanted to cross the street. They looked at me on the scoot, in my cloud of noise and smoke, and seemed to consider if crossing in front of this guy was a good idea. I jumped it a couple of times at some old couple in an expensive looking Porsche (didn't catch the exact model), but I don't think they knew what was happening. 🤣
Just trying to use up some pre-mix that I've had around before it's too late.
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Post by 90GTVert on Nov 23, 2022 15:57:10 GMT -5
At the very end of my last ride, T2 started to act like the plug was fouling when I went WOT or near. I went out this morning and replaced the spark plug and the cap. I put in an NGK BR10EG, which is the same thing the TPR 86cc used. They're slightly cheaper than the Denso iridium that Malossi specifies, but mostly I was curious to see if it makes any difference in plug/cap life. No idea how it compares to the Denso heat range because a cross reference for the Denso IW34 it showed nothing.
I checked my coolant while I was at it and it was just water. The garage stays warmer than the outside, but with temps in the 20s some mornings I wanted to change that. Put in a 60/40 mix.
Replaced the 142 main jet with a 145 and took the pilot jet out to see what I need. Took measurements and such, but I could have just searched "VHST pilot jet". It's style/type 16690. The main issue is that they don't seem to be very common. I did see that GForceMX carries them, but 2 pilot jets, 2 pilot jet o-rings and shipping is almost $40. We're close enough that I'll see if they have any Black Friday/Cyber Monday stuff to drop it to ~$35 before I order anything.
I took T2 out for a 50 mile ride to use most of my old pre-mix. It still gets over 1300F EGT WOT. Not necessarily awful, but I'm not trying to push it too much. I was a little worried going on a highway knowing it's a bit lean on the top, but it was fine for 55-75MPH briefly.
I was at 75MPH when traffic started to slow quickly ahead. Small scooters never feel safe on the highway anyhow, but even with upgraded brakes all around you know you don't belong there if people stop quickly at that speed. I almost ran into the back of a car on one of my last few rides. Following at about 55MPH and people slowed very quickly to about 20MPH for a combine in the road. I was using as much brake as I figured I could without skidding or getting the rear end up and I was a few feet from hitting the SUV in front of me. Would have just been a bump, but I don't want Buford T. Justice showing up and I have to explain T2 over this. I don't even follow people close. Some people just seem to over react, like whoever is up front didn't see this way ahead of them.
Made it home in working order, so I guess the heat range for the NGK isn't way off.
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Post by 90GTVert on Nov 29, 2022 13:46:15 GMT -5
I ordered 2 pilot jets and 2 o-rings on Friday when I saw no Black Friday sale that would change anything at gforcemx. I got a notification that same day (11/25) that my order was shipped via FedEx 2 day. So today I'm thinking I should be seeing my jets anytime. Just got an email that my order was refunded because none of it is in stock.
So I think my next option is to pay around $60 IIRC for 2 little pilot jets from overseas. It may be worse than that. I think one site wanted $57 to ship 2 jets. If only this carb used the 5mm pilot like the other 25 & 28mm Dells that I have. Anyway, it's clearly in need of a pilot jet so the one it came with isn't turned way out to the danger zone, but damn that's a lot of money for a couple of jets.
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