Clutch issues...

[rossclark]

I build one a year or two back where I was getting slippage on kicking it over - the moulding that the plunger sits in was too proud and catching on the centre plate of the clutch - puzzled me for a few days till I spotted a small witness mark on the casting.

[Andy B.L.C.]

Nice 1 Ross, cheerz for sharing! Without wanting to embarrass myself BUT... When I fitted a new clutch quadrant arm (taken straight off) on this build (the old one was massively worn) I made the Lambretta novice mistake of not kicking over before fitting the exhaust. It was at this point that I should have (did) realised that it was a clutch issue but couldn't comprehend how a brand new big bux unit could be the issue. As before I didn't order the parts, but as a five plate the Readspeed clutch pressure plate wasn't pulled in deeply enough to avoid clutch slip, the plus 1 six plate is a pure joy & even I, with white finger etc issues can use it round town with no issues.

How ever many years of experience we may have of being elbow deep in Lambretta's there's always summat new to throw us...

So CONFESSION.... I so didn't realise how inexcusably poor (cheese like & nowhere near fitting...) the standard of remade parts are. As I'm not a serial rebuilder etc I've thus far got away with the few spares that havn't got lost or lent out along the way... My fave from this learning curve is that, to cure serious play in the clutch arm (shagged splines & badly worn clutch arm shaft), the brand new clutch arm shaft would have had to have been hammered into position, it was such a bad fit & would then have been seized solid useless

[Andy B.L.C.]

Storm Caroline (think that was this w.ends one, do keep on being in denial...) took out the leccy on the Shiny Red industrial estate. So no dyno run, but more fun on the RB for me...

[Andy B.L.C.]

So on the home straight to the week end & the end game of a dyno run at Shiny Red Tuning in Stroud. Six drive train rebuilds & a yellow weather system later, my gloves weighed 1.5 kg's after the last (leccy out on the industrial estate that SRT is based on) attempt to get dynoed, the weather looks like it may even play nice this time...

So ladies & gents place your bets...

RB20, AF pipe, 28mil Delli, 6 plate Readspeed Red Devil clutch, Anthony Tambs stator, SIL lightened flywheel. Given the ingredients what kind of dyno readings might peeps be expecting...? (no prizes mind )

Results (hopefully) Sat

[dscscotty]

Which AF Pipe ?
Depending on dyno, and set up RB20's usually around 22-24ish bhp torque 17-18ish depending again largely on pipe

[ULC Soulagent]

18.6 bhp

[Andy B.L.C.]

Think it's an Nk Scotty... Why the lower reading Shane, is it due to the, what I've previously been told, low reading dyno @ Shiny? (a Mod m8's SS200 went from 14.47 bhp on a BGM box pipe to 22.83 bhp with an (I think) CSR pipe... Proper looking forward to tomorrow Got to get up earlier than planned to tighten up the forks, but the weather looks to be playing nice & some Bristol LC clubmates have been allowed to come out to play The last dyno run (Sat 3rd Oct) was aborted due to storm Alex 'weather' outing the leccy on the industrial estate that SRT is based, apparently the highest recorded rainfall since records began in 1891...! I was informed in time but was going on to visit a mate, & Lambretta lady to be... The auto Pig agio plan, turned into a Primmy idea (not bad) & may well have 'developed' into a DL 125 deal... GWAAAN K, just do it! On getting home my gloves weighed 1.5 kgs...

[ULC Soulagent]

Again it depends on which Nk pipe is used Andy, If race then I’ll say 20+, if road then I’ll stick to original 18.6
I’d say the SS kit would be an massive improvement over the Muggy kit in my eyes anyway hence ur bigger Hp reading although it’s the pipe that suited too that kit will make it sing
Looking forward for results

[Solid Air]

Don't leave it till the early hours to post the results Andy

[Andy B.L.C.]

If I weren't so knackd I'd bung this up next Weds

PFFF... Well another epic fail later...

Was hoping to sign off with 'the end'

The brand new stator plate shat itself, the mad misfires were summat else... (ignition coil right?, just collecting enough opinions/words to tell the owner of the engine what/why he should add a new variable ignition to his shopping list, do it once, do it right...)

TBC (yawn...)

[Andy B.L.C.]

Was still hitting 20 bhp even with the melting leccy issue...

[Fast n Furious]

IMO all new CDI stator LT coils need to be reworked to make them reliable before you use them.
It's not worth taking the risk.

[Andy B.L.C.]

New A. T. units included...?

[dickie]

IMO all new CDI stator LT coils need to be reworked to make them reliable before you use them.
It's not worth taking the risk.

IMO the LT coil is the real Achilles heel. That's why I only use full DC.

[dscscotty]

Stick a Vape on it, you'll never have another ignition fault again,

[Andy B.L.C.]

That was Shiny Gary's advice & has been passed on to the owner...

[ULC Soulagent]

So is this dyno going on Shiny utube?

[Andy B.L.C.]

Way too embarassing that... Waiting on the word as to whether a Vape will be the jigsaw finishing cherry on top / make the time spent worth it... Don't worry I'll be sure to post it as & when 4 Bristol Lambretta Club types were however successfully dynoed that day; a Rapido 225, RT 225, TS1 230 & an SST 265 I'm sure Gary will get the footage up...

[Andy B.L.C.]

Vape on the way ( ), with a cherry on top (3rd attempt!) dyno run to follow...

[Andy B.L.C.]

Not wanting to be an advertising tart...(jungs tut mir mal Geld ab, oder wat! ) but that SIP Vape ignition was a game changer on this ongoing RB20 issues forum post (2 other ignition systems had died...)... The very soon to be posted Shiny Red Bristol L.C. visit vid might show it... The ride home proved it 20 bhp / 15 summat torque so very useable in the real world... The end