88cc engine swap

Cleaned new engine, a bit, didn’t actually put any effort in.

86cc racer looking resplendent in battle scar red and rust.

last race at watergrasshill saw this tab for the leg shield break off, wouldn’t be a problem normally except i can’t find the tab. Have to make another.

built this in 2014, it’s done well to be fair, sold now to my dads team who’ll slap a smaller class restricted carb on it and attempt to win the stock class.

Engine vibes? i knew the engine was very vibey, my first though was loose engine bolts, now i know it was a loose engine bolt!

Tillostson looks purposeful.

Plate that some of the previous electronics were mounted on, it fell off a year or two ago and was just rattling around under the tank, finally gone. Can still see the melted plastic from this bikes previous life as a bonfire.

Stihl 090 90° elbow on the way, gotta flow it a bit and attache a filter. also the throttle cable, i’m just ignoring that huge ass pain for now..

More Runner 180 water pump woes, not sure if i want to leave the impeller behind when i switch to electric pump.

Splitting cases isn’t that hard i suppose.

slap that 88cc together

Went with boring paint in the end, figured everything else is a bit mad, so tone it down.

Needs second coat and lacquer asap, but didn’t turn out that bad considering how much i hate paint prep

Order a very cheap radial master cylinder, wasn’t really surprised when i saw this shitty casting, at least only on the clamp part, the body seems ok. i hope.

VJ21 race fairings, strangely modded road ones, was expecting much more straight forward molds, ejit store sent me a smoked screen after i asked for a plain one. sigh. still rg125 ought to look much slimmer with these clothes on.

Race 88cc, in one piece now, gy6 88cc piston installed, used a 107cc head, of the two i had the 107 had better castings and i have a lumpy long cam for it, head with the smaller chamber used a shorter cam so i gave up on that.

very direct tillotson carb, should work great!

That is of course if i can get the valves to seat.

after some lapping there are still not so good, but alright for testing purposes!

new piston is much bigger then the stock 50(right), and has a lot more compression then a stock 107 (left)

perfect deck height.

107 head on right, you can make out the combustion chamber size difference, plus the extra cooling fins.

some Runner 180 info, gotta build up an electric pump kit, toyota prius inverter pumps are perfect, but finding a switch to turn it on is not cheap, so i’ll probably settle for a switch.

uprate the cbr6 brakes, eventaully.

Other things that happened

Oh whats this for?

🙂

But never mind that, time for a spin!

Tasty noise

Bought a new bike! only new bike ever, yet to drive it, stock is too slow!

Race bike got it’s tyres, it started too. Ready To Race.

Fixed my shaver charger, “fixed”

Flat battery,

Fecked rectifier

Soldered all in again top job.

15 years plus that stone has been in my knee, so nice to have it gone.

naughty

Dog has a help out spot, but only when the weather is nice.

Runner is dead, wibbly handling isn’t as fun when you have no one to race!

Engine will live again in a decent go kart frame

Got that front end on!

feck it these clocks weight tons! steering loads lighter, that may have to do with different trail figures and the lighter wheel

Very cracked

shed upgrade!

omg work done!

Great weather for pulling the runner 180 out of the shed and trashing it.

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Pity the runners water pump disagreed, typical.

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€99.99 inverter welder from lidl, always wanted one, fingers crossed it’s not shite.

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See that roll bar? entirely full of water. holes on top, no holes on the bottom.

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Did get the tub off finally, all things are in a terrible state, so what ever happens next landrover types will be offended anyway!

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large and late update

first up the runner:

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the seats great isn’t it? yes the rest of it is falling appart but who needs it? ebay front brake calliper is in terrible state

took it on the two stroke only run to the kilumney bike show:

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It was the tzr125 that broke down, I totally got away with it!

cub 90 racer has successfully survived the paddy dakar, wish we could change our race number to 21 and go to mondello like this.

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gotta strip the engine down for the compression increase, can’t leave the mud on it for that.

run run the runner

New expensive jolly moto pipe! (correct one this time!)

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Piston looks good, nothing untoward on the back wall of the cylinder either.

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Old pipe leaving much rust behind. i’ll patch it up for a backup pipe.

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Ye hardly notice the mold, cob-webs and rust, when you have a JM pipe that’s worth more then the bike.

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Storage spot, hopefully pipe will last longer if i keeps it shiny.

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Whipped off the belt cover and polished off the rust on the rear variator, check the oil and water pump, there good but the toothed cog that powers both is quite wobbly on the shaft, better get a new one.

After spending ages trying to get the air to stay in the front tyre, I made it to the petrol station and back, brakes are worthless,suspension just totally not there. ticking over at 80k/mh. nothing blew up, excellent.

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So i’d better fix them brakes,sorta might need em. Much lube and fettling later it was time for some brute force. I fixed them so hard the caliper is now utterly shot, off to ebay! and that godsdamn slider is still stuck in there to boot.

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no zoom today anyway, their all broke.

So, with all the top end on and offing, it look like some thing ended up in the case of the ypvs racer. barrel and crank survived, new piston on the way.

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Jolly Moto pipe for runner 180 turned up, it’s pretty. Might get some time next week to dimension the pipe.

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Attempting to goto watergrasshill go-kart track today weather permitting. race bikes are ready, I’ll have to buy new head bearings for the 90, completely shot.

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new pipe for the Runner 180

Runner 180, snarkie email from PM tuning saying they couldn’t sell me an expansion pipe with out the silencer as that’s where the profits are, prompted me to buy a Jolly Moto instead, ha! no profits for you!
jl
yes my wallet is very sore now but it was worth it. Decent reviews of it too.

Got some ants in my pants last week and instead of throwing out all the cardboard from the new house, i built an arcade machine out if it!

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cad to cam, it’s all about the cardboard.

Also couldn’t find my measuring tape at the time, so i came up with a new standard of one jvc remote width, which roughly equates to 1.5 hogs feet.

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Trackday tomorrow, will the cbr survive? will they let me on the track? will i be a funny crash picture in next months work letter?

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bikes in ditchs

Most of my bikes are safety stored in the ditch, no idea how they’ll survive once i have my own shed. buggers will probably never start.

take my runner 180

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fork chrome shot, rubber on the filter of the kart airbox cracked, seats a bit buggered, front wheel (not the tyre) won’t keep the air in.

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kick it over a few time to fill the carb with three year old petrol, clean the rust off the plug, started third kick. no sweat.

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This? not really a problem, pm55 on the way! moar power!

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pm55 won’t come with a silencer, but i got loads, dug this short one first, its a chamber type.

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The carbon one is from a aprilla rs125, straight tru. worst looking too, so it’ll look just right.

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Found the tzr250 anti-rocking bar, gotta repair the engine cases where this bolts to first before i mount the rear part.

runner airbox mods

The mount i made up for the kart airbox on the runner, i knew wasn’t a perfect engineering solution, it was only secured by two points, and both those points were aligned in the wrong plane (up and down). So, i welded up the cracks again and added a strap.

Worked well, very stiff, can put alot more weight on it

The extra bracing on the upper part is a bit redundant now.

Did i mention i brought it to a dyno, and it made 2bhp more over stock? doesn’t sound like a lot but it’s a round 8% moar power!

Just needs new tyres and to solid mount the engine, think i should get a 28mm carb and chuck the 24mm on the tuk tuk. Shopping!

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