Fair weather rider
Hey guys, now i race against a few of these fxr150s that are coming from mainly welly and auckland that have been tampard with and absolutely fly around the track. What do you do and is there anything that could be done to my Loncin engine?? Thanks Tyler
Forum whore
I am not really familiar with these engines, parts you can get etc. Fish here in wellington has been mucking around with them for a while. If you can find a cheap piston that can take the engine size up to the limit of the rules that would help. I like Mikuni TM 28 carbs they can be found for bugger all. And a good exhaust that is tuned to peak torque would freshen it up I am sure.
Long Haired Yobbo
There is heaps you can do BUT if you are racing on Roys hill I would concentrate on making sure the Chassis, suspension and tyres are up to it first. The Loincin is a nice tame motor standard and great for learing to squeeze everything out of the bike.
Fi5y and Bayden both went way faster than everyone else last time we all came up from welly and Fi5y runs an almost standard loncin, I think it has a cheapo chinese 'Race CDI'.
Whats the frame, wheels and suspension off?
Heinz Varieties
Forum whore
tyler has a aprillia rs50 frame so he's sorted with that, on the the "4t tuning thread", and look on some of those websites, maybe put a cbr150 high compression piston in your bike, they are only $100nzd......, also racign CDI's for the loncins are easy to get.
good luck.
Forum whore
Great advise Max.Originally Posted by woodyracer
Erm, can you tell us what he would gain from a high compression piston....what are the gains/advantages Vs the losses/disadvantages of fitting a high compression piston to a four stroke single?
If he does fit a high compression piston, is there anything he will have to check/measure, or can he simply "bang it it" and "go racin'".........
Forum whore
Yeh don't listen to Max. You have to wonder how he was planning to get around the 2 valve 4 valve issue.
I can't find much spec on the engine but it did say peak toque is at 8000rpm if can get the bore and stroke size you could have a play with some of the calculators on the tuning page Intake / Exhaust etc http://www.wallaceracing.com/Calculators.htm
Fair weather rider
dont worry tyler its obviously a powerfull bike cos it did after all peal your rear sproket off the wheel didnt it.
No8 Wire Extraordinaire
Look old man ew-er behind the 8 ball, youv herd ov Honads ovaal pisstons yea? well just fit an oval valve with a bit of a file mark in the midel. word.
Don't you look at my accountant.
He's the only one I've got.
Fair weather rider
Haha, yes it did but either it has to much power or to many bolts fell out.
And yes i am running an Aprilia rs50 with the standard suspension and wheels, i have BT39ss on it and i could be looking for some cheap slicks...
Blowin up bikes since ages ago
Hey Tyler I wouldnt stress yourself too much about it at the moment mate. I have raced against you and you are a bloody good rider. Once you develop a bit more you are going ot be surprised at how well your bucket goes!
"Some people are like clouds, once they fuck off, it's a great day!"
Hardcore Biker
go the loncin !! Mines Bog standard. CSL here in palmy do a cam for them i think Fi5y said when i was last having a yarn to him. Iv been playing with intake lengths a bit but nothing real scientific yet. im running no filter or intake tube at the moment seems to run good. at the end of the day it comes down to the basic principals of engines, Fuel, Air, Spark
Forum whore
well its a 150cc piston it has to be better than a 145cc one....
dont listen to me tyler, i dont know shit, i jsut like thinking i do
In the riders seat
Dont they have a 16 inch front wheel?, you'll be lucky to find slicks if it does
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Forum whore
he'll probualy have to put some second hand fxr rims on then run 125gp slicks........i wouldnt imagine they'd make a slick for a 16" rim....
In the riders seat
FXR rims might work but aren't really wide enough, especially the rear, and with a the single side rear swingarm I doubt you could adapt one on easily, and I would think the stock rear rim would be to narrow unless you run a front slick on the rear
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
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