SB 5 TT / Tips Tricks Troubleshooting - Page 66 - RC Groups
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Aug 01, 2012, 02:50 AM
steliosh's Avatar
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Aug 01, 2012, 03:30 AM
Registered User
Nice one stelios!...........when do you arrive in riccione?....
Aug 01, 2012, 03:33 AM
steliosh's Avatar
Wed. 22, August... my boat arrives at Ancona around 10am, so I guess by noon, I will be there... Straight to the track, then in the evening at the hotel!
Ancona is about 110km (65-70miles) south...
Aug 01, 2012, 11:40 AM
steliosh's Avatar
Ran 5 more batteries in this hot August day! It was 34-38C...
I carefully shaved the soft edge from my front tires and suddenly no more "tucking" inside the exit of the corners!
After some use, the edge reappeared, changed the front wheel to a "shaved" one and back on track!
I enjoyed the bike, ran 24's all day, but since I was alone, I think I was not pushing that hard and fast...
Anyway, I keep doing laps after laps, I can do entire 11-12 minutes without a single crash, and that's quite comforting...
I am using all my old batteries, which despite giving me some big Ohm readings after charging, they still perform quite well... Good enough for practising...
I also went up one notch on the steering springs (blue, while previously I had whites and greens), and now I have a more responsive front end...
I managed to grind a set of crashbars, so I made a couple of new ones (can someone bring two meters of that "magic" 5mm crashbar with them, please, so we can endure the coming winter?!) and the bike is all set!
Leaving for the seaside home for 4 days, so no more practising until next week. I m taking the bike with me to do a new lexan/rider combo and give to my gifted painter, so I have a new bodyshell at the Worlds, and also to service the entire bike properly while the family will splash in the sea!
Life is good again, then!
Aug 01, 2012, 11:53 AM
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Kev71H's Avatar
Pics of your shaved front tire?
Aug 02, 2012, 08:37 PM
steliosh's Avatar
sorry Kevin... Right after I wrote this I left with the family for 4 days of vacation, so it will wait until next monday... sorry!
Aug 02, 2012, 09:02 PM
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Kev71H's Avatar
Originally Posted by steliosh
sorry Kevin... Right after I wrote this I left with the family for 4 days of vacation, so it will wait until next monday... sorry!
No worries. Enjoy.
Aug 03, 2012, 02:04 PM
steliosh's Avatar
It seems my son had his camera along,so here are a couple of pics!
On the left is a tire used for maybe 30-40 batteries...
On the right a same one but with the edge shaved (not soooooooooo carefully!)
Aug 06, 2012, 09:49 AM
Registered User
this weekend I agreed to buy a 2nd hand SB5 as a step up from my old KP bike for racing here in the UK, just occured to me that all my wheels etc are the alloy ones, how/where do I get a rear hub or adaptor etc to run my alloy wheels

Aug 06, 2012, 10:24 AM
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snesladd's Avatar
Such as this should fit nicely.
Aug 11, 2012, 10:37 PM
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carl jr's Avatar
Hi a great time running my sb5 and fm1 today both bikes are very good
Aug 12, 2012, 07:47 AM
steliosh's Avatar
Ran a few batteries at my local track yesterday...
Nothing to see/check, really, just practising my fingers, now...
I did experiment a bit with steering shock springs...
Blue ones (middle hardness) are a bit "too" lazy to steer, especially when on the throttle or part throttle and slow/med speed chicanes...
The orange springs were a bit too "fast" for my liking, meaning I had to lower the ATV too much. There's a fine point around 45-50% of ATV that lower than 45% is almost blue-like lazy and around 48-50% it starts tucking the front wheel underon fast corner exits when leaned to the crashbars...

Next to experiment was removing the oil from one of the steering shocks -for the first time, after having read in this forum and heard in person about it...
With blue springs, it was JUST as quick as I liked, the front does not tuck under and the bike is a joy to drive for 10-12 minutes without a single crash!
On Tuesday and Thursday, I may go back to the track to practice a bit more...
Sep 01, 2012, 06:34 AM
Registered User
ok I am hoping that one of you SB5 experts can save me a little time

I now have the bike, and Im trying to work out what to look at first with it.

I read about the swingarm box part, this isnt too much a problem for me I think as I will be running with silvercan stock class here in the UK

what about the longer fork legs and longer swingarm plates, have they got a proven track record?

I am going to buy a set of roadies for it, and also been looking at the steering setup, mine doesnt have the nice free moving setup like my KP does, I can hold my kp and shake steering side to side freely while holdnig the back of the bike, has anyone done away with the dampers and just run springs like on a KP?

are there any spares that you advise I should deffo be carrying, I dont have a model shop for many many miles, everything is mail order and theres no shop or dealer trackside anymore.
Sep 02, 2012, 05:41 AM
100% _Maybe
Rob1o1's Avatar
Hi AC. I am no expert, that's for sure.... and i am also interested in the swingarm box, either the one from shapeway or an aluminium one.

What I can comment on are the other things you mentioned. My bike was second hand and it needed a bit of work. I had set my steering up like edi.winter's photo on page 5 of this thread with two springs one on the left and right side of the servo horn. It worked fine. I was at the track and scaulfi who is also on here pointed out what you have said about having free steering. so I put the steering link on one side only with a spring in front and behind. Have loved it since! I could sterring the bike so much better. I also tried with a steering damper on one side (not attached to the servo horn, but a bracket) but I took it off. I don't think the SB5 dampers are smooth enough so I need to work on the damper. I’ll try it again in a fornight.

With the fork legs I was running standard. On Friday night for the third heat I put on the longer legs that I got from TWH. Great! I found the cornering was better for me and I also was able to shorten up the crash bars.

I got given a belt tensioner by some of the guys on here. That made a difference and the belt hasn't slipped again. Although the wheel is still slightly pulled to one side… maybe the box will fix this.
I bought a few spares as well like steering and shock spring set, to give me some options. Rebuild kits for the shocks. Belt. Pulley set and gears. I haven’t broken a single thing…yet… and I have crash a lot. I’ve seen someone break two wheel spokes in the last two meetings. They are cheap so maybe a set of two of them.
The rest I am still working out. But there is plenty of info in this thread.
Sep 02, 2012, 12:20 PM
steliosh's Avatar
Myself being a frequent crasher, I would suggest wheel hubs (even though I converted mine to an aluminum hub/glassfiber rear hub from Marino's OLP).
also, I have broken a steering shock shaft once (after 1.5 years, and it was in October at Riccione! Edi saved my poor a$$ then, and gave me a shaft. since then I bought a steering set to have).

I can't comment on setups, though, since each one goes with what suits them.
I've only ran the bike in Worlds Stock form (17.5T in 2011, 13.5T this year and next), which means adding a 1mm lead around the battery box and small car tyre leads around the chassis, as low as possible, to reach the minimum weight of the reg's (I am at 1905-1925 depending on tire wear! They get LIGHTER as they wear!!!)

I have emptied one of the steering shocks, kept the other with 350cps oil, plus a means of reducing the steerring triples throw... Eliminated front tire wear AND the dreadful tucking of the front wheel in fast corner-full lean exits. These are what you would need in my opinion, though I'm not that expert: 22nd this year, and as I said: I crash A LOT!).

I have made the bike narrower, using Clark's curved front chassis plates and ideas from various racers shown a couple of pages back. I was grinding the lower fairing very easily when trying very short scratchbars/high lean angles. However, Andrea Selva's bike, for example, is going with even more lean angle and he was NOT grinding his lower fairing! I watched carefully at the Worlds (he finished 3rd Stock). In my case, narrowing the lower of the bike was the solution...
You definitely need a swing arm box (I am using Edi's) and a belt tensioner (I am using Clark's Lightscale swing arm plates).
Before going to a belt tensioner, I have chewed a couple of belts. After that, none...

In the end, all we need are practised hands... Stefan Polydor was able to run an RTR SB-5 with some mod motor and finish second in one A-final at the Worlds, having borrowed the bike right before THAT final!!!!

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