Search found 1155 matches

by J1MS
Wed Mar 09, 2011 7:11 pm
Forum: Lambretta Tech
Topic: which crank ???
Replies: 18
Views: 5126

Re: which crank ???

I Spoke to Mr Kemp about the cranks used on the RB, asking him what he would recommend, a full circle crank was not his first choice. I remember Mr Kemp saying somthing along the lines of... if it's not in the crank case to start with, then how can it be drawn into the cylinder, best to fill the cas...
by J1MS
Tue Mar 08, 2011 12:09 pm
Forum: Lambretta Tech
Topic: Basic tune to a cast iron 175
Replies: 6
Views: 1327

Re: Basic tune to a cast iron 175

Try and use a genuine 175 head if you can, as it will make getting the compression somewhere near usable. Some 150 heads that are skimmed & reprofiled to 175 are so high that they can cause engines to run hot.
by J1MS
Mon Mar 07, 2011 10:18 pm
Forum: Lambretta Tech
Topic: CDI Conundrum
Replies: 8
Views: 785

Re: CDI Conundrum

A very high voltage makes a return path to earth through that wire.

The high voltages are of short duration, any extra resistance to earth through a low amperage earth wire will cause the box to try and find a path with a lower resistance, so my guess is this could be the probable cause.
by J1MS
Mon Mar 07, 2011 9:56 pm
Forum: Lambretta Tech
Topic: CDI Conundrum
Replies: 8
Views: 785

Re: CDI Conundrum

The CDI looks to have shorted to earth at the point that the cdi generates a spark that's nearest to the frame. ? This Woukd only happen if a high resistance to the spark at the plug end is high either by a bad earth cdi to frame and engine. Do you use the thick braded wire for engine to frame earth...
by J1MS
Mon Mar 07, 2011 9:45 am
Forum: Lambretta Tech
Topic: CDI Conundrum
Replies: 8
Views: 785

Re: CDI Conundrum

I would check earth continuity between cdi frame and engine. High resistance can cause cdi units to fail. Also high resistance at the plug and suppressor cap. I think innocenti reccomend no higher than 5 or 10 k Ohms for the plug and cap. You could also remove any carbon deposits on the spark plug t...
by J1MS
Fri Mar 04, 2011 3:11 pm
Forum: Lambretta Tech
Topic: HARRY BARLOW NEW BARREL
Replies: 64
Views: 13841

Re: HARRY BARLOW NEW BARREL

Why don't you change your name to Sally.
by J1MS
Thu Feb 17, 2011 1:35 pm
Forum: Vespa Tech
Topic: Malossi 221 PROBLEM SOLVED
Replies: 10
Views: 3493

Re: Malossi 221 PROBLEM SOLVED

Did you use two sets of carbon fibre one cut with a second smaller carbon reed over the top ??

Did you keep it with the standard reed stays in use ??
by J1MS
Wed Feb 16, 2011 9:03 pm
Forum: Show us yer Scoots!!
Topic: GP125
Replies: 13
Views: 2051

Re: GP125

No, that bracket is definately a later addition.
by J1MS
Tue Feb 15, 2011 10:39 am
Forum: Lambretta Tech
Topic: kickstart stops dead/meets resistence at begining of stroke
Replies: 11
Views: 1397

Re: kickstart stops dead/meets resistence at begining of str

Some will tell you to fit a thinner top plate, but that makes no difference as both thick and thin top plate are retained by the circlip, as the position of the circlip is unchanged then both will sit at the same height. Sometimes changing the spider helps as this is what position the clip and top p...
by J1MS
Mon Feb 14, 2011 7:01 pm
Forum: Lambretta Tech
Topic: Advice on ally 225 porting needed
Replies: 11
Views: 2299

Re: Advice on ally 225 porting needed

Well done on tackling this task on your own. Thought I would throw my little bit of advice when porting transfers in the bore. Once you have decided how high they need to go by degrees or in millimetres carefully mark by scribing, you can use a marker to make this scribed line easier to see. Then ca...